CVE-2026-91847 Bookly < 28.2 - Unauthenticated AI Assistant Conversation Disclosure and Message Injection via IDOR
Unauthenticated attackers can read and inject messages into other users' AI booking assistant conversations due to missing ownership verification.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91847?
CVE-2026-91847 is a medium-severity missing authorization vulnerability in Unknown Online Scheduling and Appointment Booking System, published on 19 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Online Scheduling and Appointment Booking System WordPress plugin before 28.2 does not verify that the requester owns the AI booking-assistant conversation named in its unauthenticated conversation actions, allowing any unauthenticated visitor to read another visitor's assistant messages and to inject messages into their in-progress conversation.
Weakness: CWE-639
Which versions are affected by CVE-2026-91847?
How do I fix CVE-2026-91847?
No fix has been published for CVE-2026-91847 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-2026-91847 being exploited?
There is no known exploitation of CVE-2026-91847 in the wild and no public exploit code.
Sources
Also known as GHSA-mj5r-8jcf-67xr.