CVE-2021-3312: Alkacon Opencms

Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days.

An XML external entity (XXE) vulnerability in Alkacon OpenCms 11.0, 11.0.1 and 11.0.2 allows remote authenticated users with edit privileges to exfiltrate files from the server's file system by uploading a crafted SVG document.

Affected products

• Alkacon Opencms: version 11.0 only; version 11.0.1 only; version 11.0.2 only

Published 2021-10-08. Last modified 2026-06-17.