> 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/fr/web/dom/dom-based-open-redirection.md).

# Redirection ouverte côté DOM

### Redirection ouverte basée sur le DOM

Ce laboratoire contient une vulnérabilité de redirection ouverte côté DOM. L'objectif est d'exploiter cette vulnérabilité pour rediriger la victime vers le serveur d'exploitation.

**Fragment vulnérable (bouton retour au blog)**/ Le code d'action associé au bouton dans la section des commentaires est :

{% code overflow="wrap" %}

```javascript
onclick='returnUrl = /url=(https?:////.+)/.exec(location); location.href = returnUrl ? returnUrl[1] : "/"'
```

{% endcode %}

<figure><img src="/files/68b6025ae73ee4d20dd6870d4145e70c3b4bf2c4" alt=""><figcaption></figcaption></figure>

Ce script extrait un `URL` paramètre de l'URL actuelle à l'aide d'une expression régulière et redirige vers sa valeur s'il existe ; sinon, il revient à la racine (`/`).

**Principe de fonctionnement**/ Ajoutez simplement `&URL=<cible>` à l'URL du post. Lorsque l'utilisateur clique sur « retour au blog », le script récupère ce paramètre et le navigateur est redirigé vers la cible fournie.

**Exemples d'URL**

{% code overflow="wrap" %}

```
https://0a9700fa04b783118073038f00bc00eb.web-security-academy.net/post?postId=1&url=https://jord4n.pro
```

{% endcode %}

* — après le chargement, cliquer sur retour au blog redirige vers `https://jord4n.pro`.

<figure><img src="/files/45eb02b200817f5f69b3d0bd640c43fefadffb56" alt=""><figcaption></figcaption></figure>

Pour le laboratoire (directement vers le serveur d'exploitation) :

{% code overflow="wrap" %}

```
https://0a9700fa04b783118073038f00bc00eb.web-security-academy.net/post?postId=1&url=https://exploit-0abf00fb04aa83b480d502ca019900d1.exploit-server.net/
```

{% endcode %}


---

# 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/fr/web/dom/dom-based-open-redirection.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.