The WP Hotel Booking WordPress plugin before 2.2.3 lacks proper server-side validation for review ratings, allowing an attacker to manipulate the rating value (e.g., sending negative or out-of-range values) by intercepting and modifying requests.

The WP Hotel Booking plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the updatereview() function in all versions up to, and including, 2.1.2. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.

The WP Hotel Booking plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check when adding rooms in all versions up to, and including, 2.1.5. This makes it possible for unauthenticated attackers to add rooms with custom prices.

The WP Hotel Booking plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the hotelbookingloadorderuser AJAX action in all versions up to, and including, 2.1.6. This makes it possible for authenticated attackers, with Subscriber-level access and above, to retrieve a list of registered user emails.