Vanilla: Vanilla Forums domGetImages getimagesize Unserialize Remote Code Execution Vulnerability (critical)

Summary: An unauthenticated attacker can inject an serialized payload into a phar archive and trigger read access to it via an unprotected getimagesize. The attacker can leverage this to deserialize untrusted data and gain remote code execution. Notes: - THIS BUG IS UNAUTHENTICATED, however you...