CVE-2026-87891 Rox Appointment Booking < 1.2.0 - Unauthenticated Holiday Schedule Modification via REST API
Unauthenticated attackers can modify holiday schedules in the Rox Appointment Booking plugin, disrupting booking availability.
- 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-2026-87891?
CVE-2026-87891 is a medium-severity missing authorization vulnerability in Unknown Rox Appointment Booking, published on 12 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Rox Appointment Booking WordPress plugin before 1.2.0 does not perform any capability or authorization check when saving its holiday schedule, allowing unauthenticated attackers to overwrite the dates the booking system treats as unavailable, which can block legitimate bookings or open dates the site owner intended to keep closed.
Weakness: CWE-284
Which versions are affected by CVE-2026-87891?
How do I fix CVE-2026-87891?
No fix has been published for CVE-2026-87891 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-2026-87891 being exploited?
There is no known exploitation of CVE-2026-87891 in the wild and no public exploit code.
Sources
Also known as GHSA-82fg-m2x5-cqp7.