CVE-2026-18776 TrueBooker Appointment Booking < 1.2.7 - Unauthenticated Account Takeover via Multiple AJAX Actions
Unauthenticated attackers can change arbitrary user emails to take over accounts, including administrators, due to missing authorization checks in AJAX actions.
- 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-2026-18776?
CVE-2026-18776 is a critical 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 some of its AJAX actions, allowing unauthenticated users to change the email address of arbitrary users, including administrators, and subsequently take over their account via the password reset flow.
Weakness: CWE-284
Which versions are affected by CVE-2026-18776?
How do I fix CVE-2026-18776?
No fix has been published for CVE-2026-18776 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-2026-18776 being exploited?
There is no known exploitation of CVE-2026-18776 in the wild and no public exploit code.
Sources
Also known as GHSA-ww49-2fhh-98x8.