Once you have bypassed the local checks discovered in the part4 files: Intercept the request using .
The application uses a specific middleware to sanitize inputs, but it fails to account for nested objects or array-based parameter pollution. BKPF23WEB18.part4.rar
In the "WEB18" series of this CTF, the challenge often involves or Python/Flask backend vulnerabilities. Once you have bypassed the local checks discovered
Analyze the provided source code (often distributed in parts like .part4.rar ) to find a vulnerability that allows for Flag retrieval. 🔍 Investigation 1. File Context BKPF23WEB18.part4.rar