The Event Tickets and Registration plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the 'email' action in all versions up to, and including, 5.8.1. This makes it possible for authenticated attackers, with contributor-level access and above, to email the attendees list to themselves.

The Event Tickets and Registration plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.18.1 via the tc-order-id parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to view order details of orders they did not place, which includes ticket prices, user emails and order date.