CVE-2026-104898 Privilege escalation in Online Scheduling and Appointment Booking System – Bookly
Authenticated subscribers can escalate privileges by hijacking admin staff account bindings via insecure direct object reference in the Bookly plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104898?
CVE-2026-104898 is a medium-severity vulnerability in ladela Online Scheduling and Appointment Booking System – Bookly, published on 10 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 28.4 via the 'id, wp_user_id' parameter due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the WordPress account binding of any Bookly staff record, including those owned by administrators, effectively hijacking a higher-privileged staff member's account association and escalating privileges. Exploitation requires the attacking user to be linked to at least one Bookly staff record, which occurs by default whenever an admin enables the bookly_gen_allow_staff_edit_profile option (active on fresh installs) and links a WordPress user to a staff entry.
Weakness: CWE-639
Which versions are affected by CVE-2026-104898?
How do I fix CVE-2026-104898?
No fix has been published for CVE-2026-104898 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-104898 being exploited?
There is no known exploitation of CVE-2026-104898 in the wild and no public exploit code.
Sources
Also known as GHSA-688p-jfpg-cv62.