The My YouTube Channel plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the clear_all_cache function in versions up to, and including, 3.0.12.1. This makes it possible for authenticated attackers, with subscriber-level permissions and above, to clear the plugin's cache.
https://www.wordfence.com/threat-intel/vulnerabilities/id/486b6a75-d101-4f3a-8436-6c23dd0ff200