What’s Vulnerable › Vulnerabilities
CVE-2026-86839: Bookly < 28.3 - Staff+ Appointment and Payment Disclosure, Modification and Deletion via IDOR
- Severity: low (CVSS 3.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-27 · updated 2026-09-28
- Weakness: CWE-639
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.
Affected products
- Online Scheduling and Appointment Booking System: before 28.3 — fixed in 28.3
How to fix
Upgrade to a fixed version: Online Scheduling and Appointment Booking System 28.3. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-86839 or the next vulnerability affects your stack