The Smart Online Order for Clover plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the 'moo_deactivateAndClean' function in all versions up to, and including, 1.5.6. This makes it possible for unauthenticated attackers to deactivate the plugin and drop all plugin tables from the database.
https://plugins.trac.wordpress.org/changeset/3142846/
https://plugins.trac.wordpress.org/browser/clover-online-orders/trunk/moo_OnlineOrders.php#L183