What is CVE-2026-77689?

CVE-2026-77689 is a medium-severity vulnerability in Booking For Appointments And Events Calendar, classified under Improper Access Control. CVSS score: 5.3/10. Published 2026-09-12.

How severe is CVE-2026-77689?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Booking For Appointments And Events Calendar

CVE-2026-77689

The Booking for Appointments and Events Calendar WordPress plugin before 9.8.1 does not verify that a payment was actually taken before recording a booking as paid, trusting the payment gateway named in a public, unauthenticated booking request even when the site has never configured that gateway. This lets an unauthenticated attacker obtain confirmed, fully paid appointments and events without any payment being collected.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Unknown Booking For Appointments And Events Calendar

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-77689?: CVE-2026-77689 is a medium-severity vulnerability in Booking For Appointments And Events Calendar, classified under Improper Access Control. CVSS score: 5.3/10. Published 2026-09-12.
How severe is CVE-2026-77689?: Medium severity. CVSS v3 base score is 5.3 out of 10.