Phar Deserialization

A remote code execution vulnerability exists in OpenMage LTS versions prior to 20.16.1 due to Phar deserialization, where an attacker can upload a malicious phar file disguised as an image and trigger deserialization via functions like `getimagesize()`, `file_exists()`, or `is_readable()` when processing `phar://` stream wrapper paths, leading to arbitrary code execution.