The Photo Engine (Media Organizer & Lightroom) WordPress plugin before 6.6.2 does not sanitise and escape keyword names before storing them and outputting them on its debugging page, allowing users with the Author role and above to perform Stored Cross-Site Scripting attacks against administrators who have enabled that page.

The Photo Engine (Media Organizer & Lightroom) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'hierarchy[].name' parameter in all versions up to, and including, 6.5.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable by Subscribers because the /?wplr-sync-api endpoint authenticates solely via wplrauthtoken usermeta with no capability check, and the current user's token is exposed on every admin page via localized script data due to a commented-out screen-condition guard.

The Photo Engine (Media Organizer & Lightroom) WordPress plugin before 6.5.8 does not verify that a user is authorised to act on the targeted media attachment, allowing authenticated users with the author role and above to delete arbitrary media attachments, including those uploaded by other users and administrators.