How severe is CVE-2026-4807?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Croixhaug Appointment Booking Calendar — Simply Schedule Appointments Plugin

CVE-2026-4807

The Appointment Booking Calendar plugin for WordPress is vulnerable to Missing Authorization in versions up to and including 1.6.10.6. This is due to a flawed authorization logic in the nonce_permissions_check() method combined with the pu…

Vulnerability class: Broken Access Control

EPSS: 0.000 (4.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

Affected products

Croixhaug Appointment Booking Calendar — Simply Schedule Appointments Plugin — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

Frequently asked questions

What is CVE-2026-4807?: CVE-2026-4807 is a medium-severity vulnerability in Croixhaug Appointment Booking Calendar — Simply Schedule Appointments Plugin, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-05-07.
How severe is CVE-2026-4807?: Medium severity. CVSS v3 base score is 6.5 out of 10.