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# Web Vulnerabilities Methodology
In every pentest web there is **several hidden and obvious places that might be vulnerable** . This post is meant to be a checklist to confirma that you have searched vulnerabilities in all the posible places.
## Proxies
{% hint style="info" %}
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Nowadays **web** **applications** usually **uses** some kind of **intermediary** **proxies** , those may be (ab)used to exploit vulnerabilities. These vulnerabilities need a vulnerable proxy to be in place, but they usually also need some extra vulnerability in the backend.
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{% endhint %}
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* [ ] [**Abusing hop-by-hop headers** ](abusing-hop-by-hop-headers.md )****
* [ ] ** **[**Cache Poisoning/Cache Deception**](cache-deception.md)****
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* [ ] ** **[**HTTP Request Smuggling**](http-request-smuggling/)****
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* [ ] ** **[**H2C Smuggling**](h2c-smuggling.md)****
* [ ] ** **[**Server Side Inclusion/Edge Side Inclusion**](server-side-inclusion-edge-side-inclusion-injection.md)****
* [ ] ** **[**Uncovering Cloudflare**](../pentesting/pentesting-web/uncovering-cloudflare.md)****
* [ ] ** **[**XSLT Server Side Injection**](xslt-server-side-injection-extensible-stylesheet-languaje-transformations.md)****
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## **User input**
{% hint style="info" %}
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  Most of the web applications will **allow users to input some data that will be processed later.** \
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****Depending on the structure of the data the server is expecting some vulnerabilities may or may not apply.
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{% endhint %}
### **Reflected Values**
If the introduced data may somehow being reflected in the response, the page might be vulnerable to several issues.
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* [ ] [**Client Side Template Injection** ](client-side-template-injection-csti.md )****
* [ ] ** **[**Command Injection**](command-injection.md)****
* [ ] ** **[**CRLF**](crlf-0d-0a.md)****
* [ ] ** **[**Dangling Markup**](dangling-markup-html-scriptless-injection.md)****
* [ ] [**File Inclusion/Path Traversal** ](file-inclusion/ )****
* [ ] [**Open Redirect** ](open-redirect.md )****
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* [ ] ** **[**Prototype Pollution to XSS**](deserialization/nodejs-proto-prototype-pollution/#client-side-prototype-pollution-to-xss)****
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* [ ] [**Server Side Inclusion/Edge Side Inclusion** ](server-side-inclusion-edge-side-inclusion-injection.md )****
* [ ] [**Server Side Request Forgery** ](ssrf-server-side-request-forgery.md )****
* [ ] [**Server Side Template Injection** ](ssti-server-side-template-injection/ )****
* [ ] [**Reverse Tab Nabbing** ](reverse-tab-nabbing.md )****
* [ ] [**XSLT Server Side Injection** ](xslt-server-side-injection-extensible-stylesheet-languaje-transformations.md )****
* [ ] [**XSS** ](xss-cross-site-scripting/ )****
* [ ] ** **[**XSSI**](xssi-cross-site-script-inclusion.md)****
* [ ] ** **[**XS-Search**](xs-search.md)****
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Some of the mentioned vulnerabilities requires special conditions, others just require the content to be reflected. You can find some interesting polygloths to test quickly the vulnerabilities in:
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{% content-ref url="pocs-and-polygloths-cheatsheet/" %}
[pocs-and-polygloths-cheatsheet ](pocs-and-polygloths-cheatsheet/ )
{% endcontent-ref %}
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### **Search functionalities**
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If the functionality may be used to search some kind of data inside the backend, maybe you can (ab)use it to search arbitrary data.
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* [ ] [**File Inclusion/Path Traversal** ](file-inclusion/ )****
* [ ] ** **[**NoSQL Injection**](nosql-injection.md)****
* [ ] ** **[**LDAP Injection**](ldap-injection.md)****
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* [ ] [**ReDoS** ](regular-expression-denial-of-service-redos.md )
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* [ ] [**SQL Injection** ](sql-injection/ )****
* [ ] [**XAPTH Injection** ](xpath-injection.md )****
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### **Forms, WebSockets and PostMsgs**
When websocket, post message or a form allows user to perform actions vulnerabilities may arise.
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* [ ] [**Cross Site Request Forgery** ](csrf-cross-site-request-forgery.md )****
* [ ] [**Cross-site WebSocket hijacking (CSWSH)** ](cross-site-websocket-hijacking-cswsh.md )****
* [ ] ** **[**PostMessage Vulnerabilities**](postmessage-vulnerabilities.md)****
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### **HTTP Headers**
Depending on the HTTP headers given by the web server some vulnerabilities might be present.
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* [ ] [**Clickjacking** ](clickjacking.md )****
* [ ] ** **[**Content Security Policy bypass**](content-security-policy-csp-bypass.md)****
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* [ ] ** **[**Cookies Hacking**](hacking-with-cookies/)****
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* [ ] ** **[**CORS - Misconfigurations & Bypass**](cors-bypass.md)****
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### **Bypasses**
There are several specific functionalities were some workarounds might be useful to bypass them
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* [ ] ** **[**2FA/OPT Bypass**](2fa-bypass.md)****
* [ ] ** **[**Bypass Payment Process**](bypass-payment-process.md)****
* [ ] ** **[**Captcha Bypass**](captcha-bypass.md)****
* [ ] ** **[**Login Bypass**](login-bypass/)****
* [ ] ** **[**Race Condition**](race-condition.md)****
* [ ] ** **[**Rate Limit Bypass**](rate-limit-bypass.md)****
* [ ] ** **[**Reset Forgotten Password Bypass**](reset-password.md)****
* [ ] ** **[**Registration Vulnerabilities**](registration-vulnerabilities.md)****
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### **Structured objects / Specific functionalities**
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Some functionalities will require the **data to be structured on a very specific format** (like a language serialized object or a XML). Therefore, it's more easy to identify is the application might be vulnerable as it needs to be processing that kind of data.\
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Some** specific functionalities** my be also vulnerable if a **specific format of the input is used** (like Email Header Injections). 
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* [ ] ** **[**Deserialization**](deserialization/)****
* [ ] ** **[**Email Header Injection**](email-header-injection.md)****
* [ ] ** **[**JWT Vulnerabilities**](hacking-jwt-json-web-tokens.md)****
* [ ] [**XML External Entity** ](xxe-xee-xml-external-entity.md )****
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### Files
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Functionalities that allow to upload files might be vulnerable to several issues.\
Functionalities that generates files including user input might execute unexpected code.\
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Users that open files uploaded by users or automatically generated including user input might be compromised.
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* [ ] [**File Upload** ](file-upload/ )****
* [ ] ** **[**Formula Injection**](formula-injection.md)****
* [ ] ** **[**PDF Injection**](xss-cross-site-scripting/pdf-injection.md)****
* [ ] ** **[**Server Side XSS**](xss-cross-site-scripting/server-side-xss-dynamic-pdf.md)****
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### **External Identity Management**
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* [ ] ** **[**OAUTH to Account takeover**](oauth-to-account-takeover.md)****
* [ ] ** **[**SAML Attacks**](saml-attacks/)****
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### **Other Helpful Vulnerabilities**
This vulnerabilities might help to exploit other vulnerabilities.
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* [ ] [**Domain/Subdomain takeover** ](domain-subdomain-takeover.md )****
* [ ] ** **[**IDOR**](idor.md)****
* [ ] [**Parameter Pollution** ](parameter-pollution.md )****
* [ ] ** **[**Unicode Normalization vulnerability**](unicode-normalization-vulnerability.md)****
