Tutor LMS – eLearning and online course solution <= 3.9.4 - Missing Authorization to Authenticated (Subscriber+) Limited Attachment Deletion

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to unauthorized attachment deletion due to a missing capability check on the `delete_existing_user_photo` function in all versions up to, and including, 3.9.4. This makes it possible for authenticated attackers, with subscriber level access and above, to delete arbitrary attachments on the site.