Call Now Button < 1.4.7 - Admin+ Stored XSS

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).

PoC

1. Navigate to All Buttons, and add a button. 2. Select “Button action” as Link and insert the following payload: javascript:alert(document.cookie); 3. Set the Open link in the “Current window”. 4. Visit the website and click on the button. 5. The alert will trigger.