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Complete Cybersecurity 101, or equivalent HTTP and Linux fundamentals, before this module. This Web CTF unit sits before Web Application Pentester depth and does not duplicate NeonVault theory. In this module of the Web CTF learning path, you practice authentication and logic bypasses on an intentionally legacy PHP application. You map HTTP login and cookie surfaces, abuse strcmp type juggling, forge client-trusted cookies, crack weak password hashes, trigger magic-hash comparisons, coerce numeric checks, and overwrite variables through extract. Treat every success as evidence of language-compatibility debt, not as a claim that modern frameworks still ship these defaults. Upon completion of the module, students will be able to: • Map auth challenge routes and use white-box source views without guessing blindly. • Exploit PHP strcmp array type juggling on login and OTP checks as legacy quirk labs. • Forge client-side cookie auth that trusts a SHA1 of a boolean string. • Crack a weak unsalted MD5 password and explain why salted modern hashes matter. • Trigger MD5 magic-hash equality while proving the password is not the literal target string. • Bypass numeric range checks with type coercion and abuse extract on POST data. For inquiries, please write us at https://www.darkrelay.com/cybersecurity-course-inquiry