CVE-2021-24574: Simple Banner Project Simple Banner

Medium severity, CVSS 4.8. EPSS: 0.7% chance of exploitation in the next 30 days.

The Simple Banner WordPress plugin before 2.10.4 does not sanitise and escape one of its settings, allowing high privilege users such as admin to use Cross-Site Scripting payload even when the unfiltered_html capability is disallowed.

Affected products

• Simple Banner Project Simple Banner: before 2.10.4 (fixed in 2.10.4)

Published 2021-08-23. Last modified 2026-06-17.