CVE-2026-11866 — MEDIUM (5.4)

Vulnerability Description

The Appointment Booking Plugin WordPress plugin before 5.6.3 does not validate a CSRF nonce on several state-changing actions handled by its central request dispatcher, allowing attackers to perform privileged actions, such as overwriting the booking-form configuration or disconnecting the connected payment gateway, via Cross-Site Request Forgery against a logged-in administrator.

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

LOW

Related Weaknesses (CWE)

CWE-352

References

https://wpscan.com/vulnerability/84e936b8-1978-4dc3-aa40-5ce49bfdc445/

FAQ

What is CVE-2026-11866?

CVE-2026-11866 is a vulnerability with a CVSS score of 5.4 (MEDIUM). The Appointment Booking Plugin WordPress plugin before 5.6.3 does not validate a CSRF nonce on several state-changing actions handled by its central request dispatcher, allowing attackers to perform ...

How severe is CVE-2026-11866?

CVE-2026-11866 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-11866?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.