Vulnerability · Published Jan 23, 2026 · Assigned by Patchstack
CVE-2026-24523WordPress WP FullCalendar plugin <= 1.6 - Sensitive Data Exposure vulnerability
Medium 5.3
In plain English
A medium-severity security flaw in WP FullCalendar from Marcus (aka @msykes). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 73.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Marcus (aka @msykes) | WP FullCalendar | 0 – through 1.6 |
Weakness: CWE-497 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N