Page Keys WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Page Keys plugin for WordPress, affecting all versions through 1.3.3. This vulnerability arises from inadequate input sanitization and output escaping, allowing authenticated attackers with administrator-level access to inject arbitrary web scripts via the 'page_key' parameter. The injected scripts execute when a user accesses the affected page. This issue is present in 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 in the context of the user viewing the page.