CVE-2026-86841
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.
- Published Sep 27, 2026
- CVSS 4.7 medium
- 0.2% chance of exploitation in the next 30 days (EPSS)
- A fix is available