CVE-2026-22351: Marcus Aka @msykes Wp Fullcalendar

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Marcus Aka @msykes Wp Fullcalendar: up to and including 1.6

Published 2026-02-20. Last modified 2026-06-17.