CVE-2026-24523 WordPress WP FullCalendar plugin <= 1.6 - Sensitive Data Exposure vulnerability
An attacker can retrieve embedded sensitive system information from the WP FullCalendar plugin, potentially exposing internal data to unauthorized users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-24523?
CVE-2026-24523 is a medium-severity vulnerability in Marcus (aka @msykes) WP FullCalendar, published on 23 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability in Marcus (aka @msykes) WP FullCalendar wp-fullcalendar allows Retrieve Embedded Sensitive Data.This issue affects WP FullCalendar: from n/a through <= 1.6.
Weakness: CWE-497
Which versions are affected by CVE-2026-24523?
How do I fix CVE-2026-24523?
No fix has been published for CVE-2026-24523 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-24523 being exploited?
There is no known exploitation of CVE-2026-24523 in the wild and no public exploit code.
Sources
Also known as GHSA-mp3w-p427-6237.