WP-Optimize < 4.5.3 - Author+ Arbitrary File Deletion via 'original-file' Post Meta

Description

The plugin is vulnerable to arbitrary file deletion due to insufficient file path validation in the `unscheduled_original_file_deletion()` function. This makes it possible for authenticated attackers, with Author-level access and above, to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as `wp-config.php`). This is possible because `original-file` is a public (non-protected) meta key — it does not begin with an underscore — allowing Authors to freely create or modify it on their own attachment posts via the standard Edit Media form or the REST API.