Secure Code Review: Logic, Authz & Crypto Bugs

Injection was the easy half — the sink is a function you can grep. The dangerous findings have no sink: broken access control, IDOR, business-logic flaws, weak crypto, insecure deserialization, race conditions, mass assignment. They need you to understand what the code is supposed to do — which is why automated tools miss them. We walk each class with vulnerable-vs-fixed code and how to review for an absent check.