The Booking for Appointments and Events Calendar – Amelia plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 9.9.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with custom-level access and above, to export a full CSV of booking records for any event on the site — including attendee names, email addresses, phone numbers, booking status, number of persons, price, payment status, payment amount, and coupon codes — regardless of whether they own or participate in those events.