Plugins · wp-fullcalendar · data as of 2026-11-04
Is WP FullCalendar safe? Known vulnerabilities and latest version
- Latest version
- 1.6.1
- Last updated
- 2026-09-24
- Active installs
- 8,000+
- Known issues on record
- 4
- Unpatched in latest
- 0
- Tested up to WP
- 7.1.4
Uses the FullCalendar library to create a stunning calendar view of events, posts and other custom post types — by Marcus (aka @msykes)
What to do
- Update to the latest version (1.6.1). Anything older than 1.6.1 has at least one known issue listed below. Dashboard → Updates, or Plugins → “update now”.
- If you cannot update right away, deactivate it until you can.
- Turn on auto-updates for it: Plugins → “Enable auto-updates” on its row.
- If you ran a vulnerable version and something looks off (spam pages, strange admins, redirects), run the free scan.
With WP-CLI: wp plugin get wp-fullcalendar --field=version shows what you run; wp plugin update wp-fullcalendar updates it.
Check your version
Known vulnerabilities
4 on record, newest first. “Affected” is the version range the source gives; “fixed in” is the version the source names, or (marked *) the first wordpress.org release after the last affected version.
high 7.5 CVE-2026-22351 · published 2026-02-20
Missing authorization check in WP FullCalendar (1.6 and older)
- Affected
- 1.6 and older
- Fixed in
- 1.6.1 *
- Access needed (per CVSS)
- No login needed
- Range from
- CVE record (the advisory publisher) · score by Patchstack
Details from the advisory
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.
medium 5.3 CVE-2026-24523 · published 2026-01-23
Information disclosure in WP FullCalendar (1.6 and older)
- Affected
- 1.6 and older
- Fixed in
- 1.6.1 *
- Access needed (per CVSS)
- No login needed
- Range from
- CVE record (the advisory publisher) · score by Patchstack
Details from the advisory
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.
medium 6.5 CVE-2025-22261 · published 2025-01-07
Stored cross-site scripting (XSS) in WP FullCalendar (1.5 and older)
- Affected
- 1.5 and older
- Fixed in
- 1.6
- Access needed (per CVSS)
- Needs a low-level account (e.g. subscriber); someone on the site has to click a link or open a page
- Range from
- CVE record (the advisory publisher) · score by Patchstack
Details from the advisory
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Marcus (aka @msykes) WP FullCalendar wp-fullcalendar allows Stored XSS.This issue affects WP FullCalendar: from n/a through <= 1.5.
medium 5.3 CVE-2022-3891 · published 2023-02-13
Security issue in WP FullCalendar (older than 1.5)
- Affected
- older than 1.5
- Fixed in
- 1.5
- Access needed (per CVSS)
- No login needed
- Range from
- CVE record (the advisory publisher) · score by NVD
Details from the advisory
The WP FullCalendar WordPress plugin before 1.5 does not ensure that the post retrieved via an AJAX action is public and can be accessed by the user making the request, allowing unauthenticated attackers to get the content of arbitrary posts, including draft/private as well as password-protected ones.
Recent activity
- 2026-09-24 — latest release on wordpress.org (1.6.1).
- 2026-02-20 — Missing authorization check disclosed (CVE-2026-22351), fixed in 1.6.1.
- 2026-01-23 — Information disclosure disclosed (CVE-2026-24523), fixed in 1.6.1.
- 2025-01-07 — Stored cross-site scripting (XSS) disclosed (CVE-2025-22261), fixed in 1.6.
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Browse vulnerabilities
- Published this week
- Unpatched in the latest version
- By type of vulnerability
- Plugins by Marcus (aka @msykes) (3 tracked)
Types found in this plugin: Missing authorization (1) · Sensitive data exposure (1) · Cross-site scripting (XSS) (1)
Where this data comes from
- Version, last update, installs: wordpress.org/plugins/wp-fullcalendar (Plugins API), fetched 2026-11-04.
- Vulnerabilities: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
- Each record links to its CVE page and to the original advisory (Wordfence, Patchstack or WPScan) where there is one. We only list a CVE here when its references or its advisory name this exact plugin, so a few real issues may be missing; none should be about a different plugin. Spot an error? Email Daniel.
Badge for your site or docs (states facts with a date, not a verdict):
<a href="https://laskyr.com/plugins/wp-fullcalendar"><img src="https://laskyr.com/plugins/wp-fullcalendar/badge.svg" alt="WP FullCalendar vulnerability status"></a>