The WP Wallcreeper plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the admin_notices hook in all versions up to, and including, 1.6.1. This makes it possible for authenticated attackers, with Subscriber-level access and above, to enable and disable caching.
https://plugins.trac.wordpress.org/browser/wp-wallcreeper/trunk/wp-wallcreeper.php#L166