Labs / API Logic Flaw
- Daily Challenge
- Released 21 Jul 2025
The lab needs to be started first.
Step 1: Click on the green button to Start the Lab
Step 2: Hack the URL or IP of the lab
Step 3: Use your skills and logic to find the flags!
Need help to start?
Daily Challenge
API Logic Flaw Challenge
Challenge Overview
A PHP API is running with a critical logic flaw in its authentication system. The API has a vulnerability that allows users to bypass authentication by manipulating request parameters. Your task is to identify this logic flaw and exploit it to access the admin panel and extract the hidden flag.
Learning Objectives
- Understand API authentication mechanisms
- Learn about logic flaws in web applications
- Practice parameter manipulation techniques
- Recognize authentication bypass vulnerabilities
- Develop API testing and exploitation skills
Challenge Details
The API provides several endpoints including authentication, user profile access, and an admin panel. Analyze the API behavior and find the logic flaw that allows you to bypass authentication and access protected resources. The flag is hidden in the admin panel.