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  3. 12 DOM XSS Parameters for Automated Scanning
EasyVDP10 min

12 DOM XSS Parameters for Automated Scanning

By @gorka

Red social con 12 parametros diferentes inyectables en el DOM via distintos sinks (innerHTML, document.write, eval, outerHTML, setTimeout, location.replace). Ideal para practicar con herramientas automatizadas como dalfox.

616 views49 completedUpdated Aug 2026
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Hunters who solved it· 8

PA1
@pa_8819 hours ago
guidoiriarte12
@guidoiriarte14 days ago
felipecarrillor03103
@felipecarrillor03104 days ago
kuldeepgangwar9006
@kuldeepgangwar90064 days ago
danielmijan11
@danielmijan116 days ago
itrox
@itrox6 days ago
HO
@horseman7 days ago
VA
@vazquezdv1820059 days ago

Objectives

1
Descubrir los 12 parametros inyectables
2
Identificar el sink de cada uno
3
Ejecutar XSS en cada parametro
4
Probar con herramientas automatizadas (dalfox)

Information

Difficulty
Easy
Duration
10 min
Bounty
VDP
Completed
49
Creator
gorka@gorka
Updated
Aug 2026

Download the environment

Reproduce it and find the bug yourself

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Tools

DalfoxNavegador

Prerequisites

  • DOM XSS avanzado
  • Diferentes sinks (innerHTML, eval, document.write)
  • Herramientas de scanning

Tags

XSS

Achievement you'll earn

Solve this lab to unlock this shareable achievement

BBLABS.ESLab Solved
EasyVDP
// achievement_unlocked

12 DOM XSS Parameters for Automated Scanning

XSS
Aug 2026
gorka
solved_by@gorkaMember since Mar 2026
bblabs.es// real bug bounty practice

Community writeups

Credenciales

Usuario Contrasena Rol
alice password123 user

Despliegue

# Opcion 1: autodeploy
./autodeploy.sh

# Opcion 2: manual
docker compose up --build

# Acceder
http://localhost:1000

Compatible con macOS, Linux y Windows (Docker Desktop / WSL).

Para parar:

./autodeploy.sh destroy
# o: docker compose down -v

Contenido del Lab

La aplicacion

Chirp con 12 parametros inyectables en diferentes sinks DOM.

La vulnerabilidad

12 parametros: q, ref, msg, tab, next, user, #fragment, debug, sort, lang, redirect, title. Cada uno se inyecta en un sink diferente: innerHTML, document.write, eval, outerHTML, setTimeout, location.replace, document.title.

Cadena de ataque

1. Probar ?q=<script>alert(1)</script>
2. Probar ?ref=javascript:alert(1)
3. etc. para cada parametro
4. O ejecutar: dalfox url http://localhost:1000/dashboard

Solucion interactiva

Accede a /writeup dentro de la aplicacion para una guia paso a paso con botones interactivos.


Flag

(alert/XSS ejecutado en cada parametro)

Remediacion

  1. Sanitizar todo input antes de insertarlo en el DOM
  2. Usar textContent en vez de innerHTML
  3. Nunca pasar input de usuario a eval/setTimeout
  4. CSP estricto

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