FancyBox for WordPress Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the FancyBox for WordPress plugin, affecting versions 3.0.2 to 3.3.3. The issue arises from inadequate input sanitization and output escaping, allowing authenticated attackers with administrator-level permissions to inject arbitrary scripts. This vulnerability is triggered when a user accesses a page containing the injected script, and it specifically impacts multi-site installations where unfiltered HTML has been disabled.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed when users access the affected pages.

Remediation

Users can update to FancyBox for WordPress version 3.3.4 or a newer patched version to address this vulnerability.