CVE-2026-86839 Bookly < 28.3 - Staff+ Appointment and Payment Disclosure, Modification and Deletion via IDOR
Authenticated staff users can view, modify, and delete other staff members' appointments and payments due to missing ownership checks.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86839?
CVE-2026-86839 is a low-severity missing authorization vulnerability in Unknown Online Scheduling and Appointment Booking System, published on 27 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-86839?
How do I fix CVE-2026-86839?
No fix has been published for CVE-2026-86839 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-86839 being exploited?
There is no known exploitation of CVE-2026-86839 in the wild and no public exploit code.
Sources
Also known as GHSA-36wf-cx88-gfjh.