The RSVP and Event Management plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on several AJAX functions like bulk_delete_attendees() and bulk_delete_questions() in all versions up to, and including, 2.7.13. This makes it possible for unauthenticated attackers to delete questions and attendees and for authenticated users to update question menu orders.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.