CVE-2026-22351: Missing Authorization in Marcus (aka @msykes) WP FullCalendar
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.
AI Analysis
Technical Summary
The WP FullCalendar plugin for WordPress, maintained by Marcus (aka @msykes), contains a Missing Authorization vulnerability (CVE-2026-22351) in versions up to 1.6. This vulnerability arises from incorrectly configured access control, allowing unauthenticated remote attackers to access sensitive calendar data. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) indicates network attack vector, low attack complexity, no privileges or user interaction required, unchanged scope, and high confidentiality impact without affecting integrity or availability.
Potential Impact
Exploitation of this vulnerability can lead to unauthorized disclosure of sensitive calendar information managed by the WP FullCalendar plugin. There is no indication of impact on data integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or fix links are provided, users should monitor the vendor's communications for updates. Until a fix is available, consider restricting access to the calendar data or disabling the plugin if sensitive information exposure is a concern.
CVE-2026-22351: Missing Authorization in Marcus (aka @msykes) WP FullCalendar
Description
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The WP FullCalendar plugin for WordPress, maintained by Marcus (aka @msykes), contains a Missing Authorization vulnerability (CVE-2026-22351) in versions up to 1.6. This vulnerability arises from incorrectly configured access control, allowing unauthenticated remote attackers to access sensitive calendar data. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) indicates network attack vector, low attack complexity, no privileges or user interaction required, unchanged scope, and high confidentiality impact without affecting integrity or availability.
Potential Impact
Exploitation of this vulnerability can lead to unauthorized disclosure of sensitive calendar information managed by the WP FullCalendar plugin. There is no indication of impact on data integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or fix links are provided, users should monitor the vendor's communications for updates. Until a fix is available, consider restricting access to the calendar data or disabling the plugin if sensitive information exposure is a concern.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Patchstack
- Date Reserved
- 2026-01-07T12:21:19.920Z
- Cvss Version
- null
- State
- PUBLISHED
Threat ID: 6998ca00be58cf853bab9209
Added to database: 2/20/2026, 8:54:24 PM
Last enriched: 5/1/2026, 7:44:38 PM
Last updated: 5/22/2026, 5:18:02 PM
Views: 100
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