Responsive Header WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Responsive Header plugin for WordPress, affecting all versions up to and including 1.0. The issue arises from inadequate input sanitization and output escaping, allowing authenticated attackers with administrator-level access to inject arbitrary scripts. These scripts are executed when users access the affected pages. This vulnerability is present in multi-site installations where unfiltered HTML is disabled.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the page.