Exploiting PHP Type Juggling and Internal Classes in CTF Challenges

Challenge 1: Magic Methods via Internal ClassesThe regex validation requires both parameters to contain alphabetic characters. The eval function executes the string as PHP code, where new $v1 instantiates a class named by the value of $v1, and ($v2()) invokes the function specified by $v2, passing its return value to the constructor.When an obj ...

Posted on Fri, 03 Jul 2026 17:54:41 +0000 by wkilc