What is CVE-2026-22351?

CVE-2026-22351 is a high-severity vulnerability in Marcus (Aka @Msykes) Wp Fullcalendar, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-02-20.

How severe is CVE-2026-22351?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Marcus (Aka @Msykes) Wp Fullcalendar

CVE-2026-22351

Missing Authorization vulnerability in Marcus (aka @msykes) WP FullCalendar wp-fullcalendar allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP FullCalendar: from n/a through <= 1.6.

Vulnerability class: Broken Access Control

EPSS: 0.003 (20.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Marcus (Aka @Msykes) Wp Fullcalendar — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-22351?: CVE-2026-22351 is a high-severity vulnerability in Marcus (Aka @Msykes) Wp Fullcalendar, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-02-20.
How severe is CVE-2026-22351?: High severity. CVSS v3 base score is 7.5 out of 10.