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

# Redirección abierta basada en DOM

### Redirección abierta basada en DOM

Este laboratorio contiene una vulnerabilidad de redirección abierta en el lado del DOM. El objetivo es aprovechar esta vulnerabilidad para redirigir a la víctima al servidor de explotación.

**Fragmento vulnerable (botón de volver al blog)**/ El código de acción asociado al botón en la sección de comentarios es:

{% code overflow="wrap" %}

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

{% endcode %}

<figure><img src="/files/55091a334804425db03541694891aced3031203c" alt=""><figcaption></figcaption></figure>

Este script extrae un `URL` parámetro de la URL actual usando una expresión regular y redirige a su valor si existe; de lo contrario, vuelve a la raíz (`/`).

**Principio de funcionamiento**/ Solo añade `&URL=<destino>` a la URL de la publicación. Cuando el usuario hace clic en "volver al blog", el script recupera este parámetro y el navegador se redirige al destino proporcionado.

**Ejemplos de URL**

{% code overflow="wrap" %}

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

{% endcode %}

* — después de cargarlo, haz clic en volver al blog para que redirija a `https://jord4n.pro`.

<figure><img src="/files/12b5f5c00165bf6aa2fd80d89d338686ba4e951c" alt=""><figcaption></figcaption></figure>

Para el laboratorio (directamente al servidor de explotación):

{% code overflow="wrap" %}

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

{% endcode %}


---

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