[ CVE-2026-86841 · Published 27 Sep 2026 ]
Vulnerability in Unknown Online Scheduling and Appointment Booking System
CVSS 4.7
EPSS <1%No fix listed yet
[ Description ]Official description
The Online Scheduling and Appointment Booking System WordPress plugin before 28.3 does not prevent deserialization of untrusted input and does not correctly restrict a privileged maintenance feature to administrators, allowing users granted a custom booking-management capability, which an administrator must explicitly assign, to inject arbitrary PHP objects, overwrite privileged site options, and read stored integration secrets.
[ 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.