WordPress Sticky Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Sticky plugin for WordPress, affecting versions through 2.5.6. The issue arises from inadequate input sanitization and output escaping in the 'cvmh_sticky_front_render()' function. The vulnerability allows authenticated attackers with Contributor-level access and above to inject arbitrary web scripts via the 'readmoretext' attribute of the 'cvmh-sticky' shortcode. The injected scripts are executed when a user accesses a page containing the modified shortcode.

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.