Extra Settings for RocketChat WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Extra Settings for RocketChat plugin for WordPress, affecting versions through 0.1. The issue arises from inadequate input sanitization and output escaping in the 'rocketchat' shortcode's 'title' attribute. This vulnerability allows authenticated attackers with contributor-level access and above to inject arbitrary scripts into pages, which are executed when users access the affected page.

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.

Reproduction

To reproduce this vulnerability, an authenticated user with contributor-level access or higher can use the 'rocketchat' shortcode and include a script in the 'title' attribute. Once the shortcode is processed, the injected script will execute when the page is viewed.