4.7
Medium
CVE-2026-86841 The Online Scheduling and Appointment Booking System WordPress plugin before 28.3 does not prevent deserialization of…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Online Scheduling and Appointment Booking System 23.2 | 23.2 → < 28.3 | 28.3 |
Other CVEs of Online Scheduling and Appointment Booking System
The 4 CVEs of Online Scheduling and Appointment Booking System →
CVE-2026-86839
The Online Scheduling and Appointment Booking System WordPress plugin before 28.3 does not verify that appointment…
3.8
Low
CVE-2026-91847
The Online Scheduling and Appointment Booking System WordPress plugin before 28.2 does not verify that the requester…
4.8
Medium
CVE-2026-13395
The Online Scheduling and Appointment Booking System WordPress plugin before 27.8 does not sanitize or properly cast…
8.6
High