Appointment Booking Calendar Vulnerabilities

High severity vulnerability in Simply Schedule Appointments (WordPress plugin). The Appointment Booking Calendar - Simply Schedule Appointments plugin for WordPress is vulnerable to unauthorized access of sensitive data in all versions up to and including 1.6.9.29. This is due to two compounding weaknesses: (1) a non-user-bound `public_nonce` is exposed to unauthenticated users through the public `/wp-json/ssa/v1/embed-inner` REST endpoint, and (2) the `get_item()` method ...

An Insecure Direct Object Reference (IDOR) vulnerability exists in the Appointment Booking Calendar - Simply Schedule Appointments plugin for WordPress versions up to 1.6.9.29, allowing authenticated users with the ssa_manage_appointments capability to access appointment records belonging to other staff members without authorization. Attackers can exploit the get_item_permissions_check method to enumerate and view sensitive customer personally identifiable information by manipulating appointment ID parameters. The vulnerability has a CVSS score of 4.3 with low attack complexity and requires only low-level authentication, making it a practical concern for multi-staff WordPress installations.