Access Control Vulnerability in WP FullCalendar by Marcus
CVE-2026-22351

6.5MEDIUM

Key Information:

Vendor

WordPress
Status
WP Fullcalendar
Vendor
CVE Published:
20 February 2026

What is CVE-2026-22351?

The WP FullCalendar plugin developed by Marcus is susceptible to a missing authorization vulnerability that allows attackers to exploit incorrectly configured access control settings. This security flaw can lead to unauthorized access, enabling malicious users to manipulate data or perform actions that should be restricted. Versions prior to 1.6 are particularly affected, highlighting the importance of patching and securing installations to prevent potential exploitation. For more details, refer to the Patchstack database entry.

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Deploy the Patch

Affected Version(s)

WP FullCalendar <= n/a

References

https://patchstack.com/database/Wordpress/Plugin/wp-fullc...
vdb-entry

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Doan Dinh Van | Patchstack Bug Bounty Program
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