Bookify <= 1.0.9 - Authenticated (Subscriber+) Privilege Escalation

The Appointment Booking Plugin for WordPress | Efficient Booking, Calendar & Client Scheduling – Bookify plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.0.9. This is due to plugin missing capability checks on several REST API endpoints. This makes it possible for authenticated attackers, with Subscriber-level access and above, to create new user accounts with administrator privileges.