Developer Publishes Step-by-Step Walkthrough of Web Security CTF Exam

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A developer has published a detailed technical walkthrough on DEV Community demonstrating how to complete a web-based real-time assessment (Web-RTA) security exam. The exercise involved two small Flask web applications, each containing exploitable vulnerabilities including SQL injection, JWT algorithm-none bypass, and XML-based attack surfaces. The author showed that just three tools — curl, python3, and ffuf — were sufficient to enumerate endpoints, bypass authentication, and extract flags from both targets. Key vulnerabilities exploited included a math CAPTCHA bypass, forged unsigned JWTs, and admin access gained through login-form SQL injection. The writeup concludes with a full answer table and a summary of lessons learned about common web application security weaknesses.

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ProgrammingDEV Community ·

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