> 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/access-control/user-id-controlled-by-unpredictable-guid-parameter.md).

# ID de usuario controlado por parámetro GUID impredecible

#### ID de usuario controlado por parámetro

Este laboratorio presenta una **escalada de privilegios horizontal** vulnerabilidad en la página de cuenta de usuario. / La particularidad es que **los usuarios se identifican mediante GUID**, es decir, credenciales largas y aleatorias, por ejemplo:

```bash
9e2f3fc0-7035-48ed-ad6d-f643690c7b9d
```

Después de conectarnos a la cuenta **wiener:peter**, puedes ver tu propio GUID en la sección Mi cuenta.

<figure><img src="/files/2bc4878fb8e54d139b3b4c4e5a1d7f80bef8b75d" alt=""><figcaption></figcaption></figure>

#### **Recuperación de GUID mediante publicaciones**

Al navegar por el sitio, encontramos en las **publicaciones visibles** los GUID de otros usuarios:

* El GUID del administrador aparece en una de sus publicaciones.

<figure><img src="/files/84704059d40b01764c31459ca87b9c1d3f9937e0" alt=""><figcaption></figcaption></figure>

De manera similar, podemos recuperar el GUID de **carlos**.

<figure><img src="/files/b0fe2fa9ebf32e0eaeb585b3206c9f35711a8ffd" alt=""><figcaption></figcaption></figure>

```bash
?userId=5abc76d3-7763-4be9-83d1-c6181bcdf0b5
```

#### **Operación: Acceso a la cuenta de Carlos**

La página de cuenta es accesible mediante un parámetro controlable:

```bash
my-account?id=5abc76d3-7763-4be9-83d1-c6181bcdf0b5
```

Simplemente reemplazando nuestro GUID por **carlos**, obtenemos su cuenta:

<figure><img src="/files/f14e95688465af45542b07a3ce39b37e72db2c62" alt=""><figcaption></figcaption></figure>


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