Simple Local Avatars < 2.8.0 - Missing Authorization to Authenticated (Subscriber+) User Cache Clearing

Description

The Simple Local Avatars plugin for WordPress is vulnerable to unauthorized modification of datadue to a missing capability check on the sla_clear_user_cache function in all versions up to, and including, 2.7.11. This makes it possible for authenticated attackers, with Subscriber-level access and above, to clear user caches.