Booking Ultra Pro <= 1.1.6 - Cross-Site Request Forgery

The Booking Ultra Pro plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.1.6. This is due to missing or incorrect nonce validation on most AJAX actions. This makes it possible for unauthenticated attackers to inject malicious JavaScript, obtain information about staff users, change opening times and more, via forged request granted they can trick a site administrator into performing an action such as clicking on a link.