The WaMate Confirm – Order Confirmation plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 2.0.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to block and unblock phone numbers, which should be restricted to administrators.
https://plugins.trac.wordpress.org/browser/wamate-confirm/trunk/customnotification.php#L1596
https://plugins.trac.wordpress.org/browser/wamate-confirm/trunk/customnotification.php#L1579
https://plugins.trac.wordpress.org/browser/wamate-confirm/tags/2.0.1/customnotification.php#L1596
https://plugins.trac.wordpress.org/browser/wamate-confirm/tags/2.0.1/customnotification.php#L1579