[ CVE-2026-86839 · Published 27 Sep 2026 ]
Vulnerability in Unknown Online Scheduling and Appointment Booking System
CVSS 3.8
EPSS <1%No fix listed yet
[ Description ]Official description
The Online Scheduling and Appointment Booking System WordPress plugin before 28.3 does not verify that appointment and payment records requested through its staff-role AJAX actions belong to the requesting staff member, allowing authenticated attackers with a staff-level account to view, modify and delete other staff members' appointments and payments, including the associated customer's personal information.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.