Wp-Adv-Quiz <= 1.0.4 - Admin+ Stored XSS in Quiz Overview

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. Under “WP Adv Quiz -> WP Adv Quiz” click “add quiz”. 2. For the title, enter: ‘">’. 3. Save the quiz. 4. Navigate back to “WP Adv Quiz -> WP Adv Quiz” and see the XSS.