> 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 basée sur le DOM
Notes sur la redirection ouverte basée sur le DOM pour les laboratoires PortSwigger Web Security Academy, y compris le flux de travail d’exploitation, les tests de charge utile, la validation avec Burp Suite et le contexte de remédiation.
### Redirection ouverte basée sur le DOM
Ce labo 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 %}
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=` 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 chargement, cliquer sur retour au blog redirige vers `https://jord4n.pro`.
Pour le labo (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 %}
---
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