Aimy Captcha-Less Form Guard: The Anti-Bot Plugin That Hands Bots the Keys

An unauthenticated PHP object injection in Aimy Captcha-Less Form Guard for Joomla, where a repeating-key XOR published alongside its own ciphertext turns every protected form into an unserialize() sink and, on Joomla 3.9 through 5.2.1, into remote code execution.