CVE-2026-18777 Missing authorization in TrueBooker
Unauthenticated attackers can arbitrarily change appointment statuses and trigger customer notification emails in the TrueBooker WordPress plugin.
- 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-2026-18777?
CVE-2026-18777 is a medium-severity missing authorization vulnerability in Unknown TrueBooker, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The TrueBooker WordPress plugin before 1.2.7 does not have proper authorisation checks in one of its AJAX actions, allowing unauthenticated users to change the status of arbitrary appointments, as well as to trigger notification emails to the affected customers.
Weakness: CWE-862
Which versions are affected by CVE-2026-18777?
How do I fix CVE-2026-18777?
No fix has been published for CVE-2026-18777 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-2026-18777 being exploited?
There is no known exploitation of CVE-2026-18777 in the wild and no public exploit code.
Sources
Also known as GHSA-8fxq-m46w-rjrf.