Vimeo SimpleGallery <= 0.2 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Plugin Settings Modification

The Vimeo SimpleGallery plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 0.2. This is due to missing authorization checks on the `vimeogallery_admin` function hooked to `admin_menu`. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify arbitrary plugin settings via the `action` parameter.