WP SMTP Mailing Queue < 2.0.1 - Admin+ Stored XSS

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 “Settings > SMTP Mailing Queue > Tools” 2. For the “Message” value add the code: ![](1) 3. Refresh page and see XSS.