CVE-2021-25968: Alkacon Opencms

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

In “OpenCMS”, versions 10.5.0 to 11.0.2 are affected by a stored XSS vulnerability that allows low privileged application users to store malicious scripts in the Sitemap functionality. These scripts are executed in a victim’s browser when they open the page containing the vulnerable field.

Affected products

• Alkacon Opencms: from 10.5.0, before 11.0.2 (fixed in 11.0.2)

Published 2021-10-19. Last modified 2026-06-17.