[Mission] SQL Injection Defense Fortress

🎯 SQL Injection Defense Fortress (Defensive · Level 2 · +200 XP)

A membership database query service dynamically concatenates user input into raw SQL queries, allowing attackers to inject tautologies like ' OR 1=1 -- and alter query logic. Refactor the query builder to use parameterized prepared statements with positional or named placeholders to secure the database layer.

Learning & Defense Goals:

• Inspect how dynamic string interpolation allows attackers to modify SQL parse trees
• Refactor vulnerable SQL queries to use PDO prepared statements with bound parameters
• Run automated injection defense test vectors to verify zero syntax alteration and obtain the flag

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Community Discussion Rules: Discuss methodologies, discovery tactics, and architectural hardening. Please do not post raw flags directly. Share your production remediation code!