CVE-2026-18777: medium-severity vulnerability in TrueBooker
TrueBooker Appointment Booking < 1.2.7 - Unauthenticated Arbitrary Appointment Status Change via update_appointment_status
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 5.3epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected products
Unknown · TrueBookerpublic PoCs found — 1
cve_referencewpscan.com/vulnerability/05a09ba7-b781-4462-8c50-3a45f2757cb2/unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — TrueBooker
In the same product, most dangerous first.
CVE-2024-6924CRITICALTrueBooker < 1.0.3 - Multiple Unauthenticated SQLiEPSS 3.3%CVE-2026-18776CRITICALTrueBooker Appointment Booking < 1.2.7 - Unauthenticated Account Takeover via Multiple AJAX ActionsEPSS 0.5%CVE-2026-14545CRITICALTrueBooker Appointment Booking < 1.2.4 - Unauthenticated Account Takeover via Password ResetEPSS 0.5%CVE-2026-18778MEDIUMTrueBooker Appointment Booking < 1.2.7 - Unauthenticated Customer PII Disclosure via Multiple AJAX ActionsEPSS 0.3%CVE-2026-18779MEDIUMTrueBooker Appointment Booking < 1.2.7 - Unauthenticated Appointment and Payment Record Deletion via update_appointment_bookedEPSS 0.3%CVE-2024-6925MEDIUMTrueBooker < 1.0.3 - Settings Update via CSRFEPSS 0.2%