The Booking for Appointments and Events Calendar – Amelia plugin for WordPress is vulnerable to unauthorized modification of data in all versions up to, and including, 2.4.5. This is due to the plugin accepting a client-supplied package-redemption identifier as proof of payment without validating it. This makes it possible for unauthenticated attackers to create approved appointment bookings without completing payment

Missing Authorization vulnerability in ameliabooking Amelia ameliabooking allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Amelia: from n/a through <= 1.2.38.