The Five Star Restaurant Reservations WordPress plugin before 2.7.23 does not perform a capability check on one of its AJAX actions, allowing users with the lowest booking-management role (which by default cannot access the Five Star Restaurant Reservations WordPress plugin before 2.7.23's settings) to reset the site's configured booking notification rules.
https://wpscan.com/vulnerability/2c28e8b9-4293-4cf4-990d-09727275935b/