CVE-2020-37237: Compo Composr CMS

Medium severity, CVSS 6.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Composr CMS 10.0.34 contains a persistent cross-site scripting vulnerability that allows authenticated administrators to inject malicious scripts through the banner management interface. Attackers with admin credentials can inject XSS payloads in the Description field of the Add banner functionality, which execute for all website visitors when they access the home page.

Affected products

• Compo Composr CMS: version 10.0.34 only

Published 2026-05-16. Last modified 2026-09-29.