> 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/xss/dom-xss-in-href-attribute-with-jquery-location-search.md).

# XSS DOM en un atributo href con jQuery y location.search

Notas de XSS DOM en un atributo href con jQuery y location.search para laboratorios de PortSwigger Web Security Academy, incluido el flujo de explotación, pruebas de payloads, validación con Burp Suite y contexto de remediación.

### DOM XSS en el atributo href de JQuery Anchor usando location.search como fuente

Vulnerabilidad de DOM XSS en la página de comentarios. El sitio utiliza la `$` función de jQuery para seleccionar un `<a>` elemento (el enlace de retorno) y reemplaza su `href` atributo con un valor extraído de `location.search`. Este valor puede controlarse mediante la URL.

**Estudio del laboratorio:**/ Hacer que el enlace "back" active `alert(document.cookie)` al hacer clic en él (ejecuta una alerta que contenga las cookies de la página).

<figure><img src="https://754079710-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-ab4262062acd2338796992d1123d759e2b22617c%2F%7BDEA680DF-93BC-4DBC-8C56-DE289A554F15%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

**Observaciones:**

* El botón "back" hace referencia a la raíz del sitio; está conectado a un `returnPath` parámetro en la URL.
* Al modificar `returnPath`, puedes definir el destino del `href` enlace.

Usa un esquema JavaScript en `href`:

```javascript
javascript:alert(0)
```

Para recuperar la cookie de sesión y mostrar:

```javascript
javascript:alert(document.cookie)
```

<figure><img src="https://754079710-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-fbefe0816b47e04b0c660b746beea1a405f8203b%2F%7B1F6159B5-826F-4C62-B7BD-553F80FC3367%7D.png?alt=media" alt=""><figcaption></figcaption></figure>


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