CVE-2025-22261: 
WordPress vulnerability analysis and mitigation

A Stored Cross-Site Scripting (XSS) vulnerability was discovered in WP FullCalendar plugin versions 1.5 and earlier. The vulnerability was identified on January 6, 2025, and was assigned CVE-2025-22261. This security issue affects WordPress installations using the vulnerable versions of the WP FullCalendar plugin (Patchstack).

The vulnerability is classified as a Cross-Site Scripting (XSS) issue, specifically of the stored variety, which falls under the OWASP Top 10 category A3: Injection. It received a CVSS score of 6.5, indicating a moderate severity level. The vulnerability requires Contributor or higher privilege level for exploitation (Patchstack).

The vulnerability could allow malicious actors to inject harmful scripts, including redirects, advertisements, and other HTML payloads into the website. These injected scripts would then be executed when visitors access the affected site (Patchstack).

The vulnerability has been fixed in version 1.6 of the WP FullCalendar plugin. Users are advised to update to version 1.6 or later to remove the vulnerability. Patchstack users have the option to enable auto-update for vulnerable plugins (Patchstack).