Social Media Share Buttons < 2.8.9 – Admin+ Stored XSS via settings | CVE 2024-2118

Description

The plugin does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

Proof of Concept

1. Go to "Ultimate Social Media Icons" 
2. Under "Which icons do you want to show on your site?", select X
3. Under "What do you want the icons to do?", in the field "Follow me on X" add the payload: `(https://asd\\\\\\\"onmouseover=alert(112312)//)`
4. Save the settings
5. Then add the "Ultimate Social Media Icons" widget to your site's widget area
6. View the frontend of the site and move your mouse over the X menu and submenu to see the XSS