Eventer <= 3.9.9 - Missing Authorization to Authenticated (Subscriber+) Bookings Export

The Eventer plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the 'eventer_export_bookings_csv' function in all versions up to, and including, 3.9.9. This makes it possible for authenticated attackers with subscriber-level permissions or above, to download bookings, which contains customers' personal data.