> 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-document-write-with-location-search.md).
# XSS DOM document.write con location.search
Notas de XSS DOM document.write con 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 sumidero document.write usando la fuente location.search
Este laboratorio contiene una vulnerabilidad DOM del lado XSS en la función de seguimiento de consultas de búsqueda. La página usa `document.write` para escribir datos de `location.search` en el DOM, que puede controlarse mediante la URL.
**Descripción de la vulnerabilidad**/ `document.write` se llama con la `location.search` cadena sin saneamiento. Como la entrada proviene directamente de la URL, un atacante puede inyectar HTML/JS en la página manipulando `location.search`.
**Objetivo para resolver** Realiza un ataque XSS del lado del DOM que llame a la `alert()` función cuando se cargue la página.
**Comentarios/índices**/ El código genera algo como una `` etiqueta que contiene un `searchTerms` parámetro entre comillas, por ejemplo:
```html
```
Si cierras la `` etiqueta y las comillas, puedes insertar contenido HTML/JS arbitrario.
**Ejemplos de cargas útiles probadas (proporcionadas)**/ Cierra la etiqueta e inyecta HTML:
```html
">
hack
```
Cierra la etiqueta e inyecta un script para activar `alerta`:
```javascript
">
```
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