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Hard1h

Advanced IDOR Challenges

By @gorka

Plataforma corporativa con 8 desafios progresivos de IDOR: desde IDOR directo hasta Type Juggling, Array Injection, Body Parameter Override, Predictable IDs, HTTP Parameter Pollution, Mass Assignment y Transfer Intent Manipulation.

This hack was reported with no reward

958 views12 completedUpdated Nov 2026
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Hackers who solved it· 8

sharat chandra1
@sharat chandraOct 2026
orangelpbx2
@orangelpbxAug 2026
flyingwhales3
@flyingwhalesJul 2026
kaneki
@kanekiJul 2026
AL
@alex.burja.2000Jul 2026
benjaminnocervigni
@benjaminnocervigniJun 2026
pl4nkton
@pl4nktonJun 2026
w4tchw0lf
@w4tchw0lfJun 2026

Objectives

1
Completar los 8 niveles de IDOR progresivos
2
Aprender diferentes tecnicas de bypass de autorizacion
3
Explotar Type Juggling, Array Injection y HPP

Information

Difficulty
Hard
Duration
1h
Bounty
Sin recompensa
Completed
12
Creator
gorka@gorka
Updated
Nov 2026

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Reproduce it and find the bug yourself

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Tools

Burp Suitecurl

Prerequisites

  • IDOR basico
  • Manipulacion de parametros HTTP
  • Type juggling en JavaScript

Tags

IDOR

Achievement you'll earn

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Credenciales

Usuario Contrasena Rol
alex_intern alex123 intern
elena_ceo elena2024 CEO
miguel_cto miguel123 CTO

Despliegue

# Opcion 1: autodeploy
./autodeploy.sh

# Opcion 2: manual
docker compose up --build

# Acceder
http://localhost:2100

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

Para parar:

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

Contenido del Lab

La aplicacion

NexusHub es una plataforma corporativa con documentos confidenciales, transferencias y gestion de empleados. Cada nivel introduce una tecnica de IDOR mas avanzada.

La vulnerabilidad

8 endpoints con diferentes variantes de IDOR: directo, type juggling (number vs string), array injection ([id]), body override, IDs predecibles, HPP (?id=1&id=2), mass assignment en updates, y manipulacion de intents de transferencia.

Cadena de ataque

Nivel 1: IDOR directo en ID
Nivel 2: Type juggling (enviar numero en vez de string)\nNivel 3: Array injection [userId]
Nivel 4: Body parameter override
Nivel 5: IDs predecibles/secuenciales
Nivel 6: HTTP Parameter Pollution
Nivel 7: Mass Assignment en update
Nivel 8: Transfer intent manipulation

Solucion interactiva

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


Flag

(cada challenge tiene su propia flag)

Remediacion

  1. Validar autorizacion en cada acceso a recursos
  2. No confiar en el tipo de dato del parametro
  3. Usar UUIDs en vez de IDs secuenciales
  4. Validar que el recurso pertenece al usuario autenticado

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