WP SMTP Mailing Queue < 2.0.1 - Admin+ Stored XSS

2023-04-0500:00:00

jidle

settings smtp mailing queue tools message value code refresh page exploit

0.001 Low

EPSS

Percentile

32.1%

JSON

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)

1. Navigate to "Settings > SMTP Mailing Queue > Tools"
2. For the "Message" value add the code: `</textarea><img src=1 onerror=alert(/xss/)><textarea>`
3. Refresh page and see XSS.