> 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/xss-in-a-javascript-string-with-apostrophe-and-backslash-escaped.md).
# XSS en una cadena JavaScript con apóstrofo y barra invertida escapados
Notas de XSS en una cadena JavaScript con apóstrofo y barra invertida escapados para laboratorios de PortSwigger Web Security Academy, incluido el flujo de explotación, pruebas de payloads, validación con Burp Suite y contexto de remediación.
### XSS reflejado en una cadena de JavaScript con comilla simple y barra invertida escapadas
XSS reflejado en la función de seguimiento de términos de búsqueda. El valor reflejado se inserta en una cadena de JavaScript; las comillas simples y las barras invertidas se escapan, lo que dificulta la evasión.
Objetivo
* Salir de la cadena de JavaScript escapada y llamar `alert()`.
Observaciones actuales
* Si `pruebas` se envía, el valor se almacena en la `searchTerm` variable del script.
* Intentar introducir una nueva variable:/ `testing'; var=test='thisIsATest`/ → Se observa que las comillas y las barras invertidas () están inyectadas/presentes e impiden la inyección directa.
```bash
testing'; var=test='thisIsATest
```
* Simplemente insertar la etiqueta de cierre del script puede cerrar el contexto del script: ``
```javascript
```
* Después de cerrar, se puede renderizar texto HTML simple: `
HACK
`
```javascript
HACK
```
* Y finalmente, es posible ejecutar un `alerta` añadiendo un nuevo ``
```javascript
```
---
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