CVE-2026-3007: Three Learning Koollab Learning Management System

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Successful exploitation of the stored cross-site scripting (XSS) vulnerability could allow an attacker to execute arbitrary JavaScript on any user account that has access to Koollab LMS’ courselet feature.

Affected products

• Three Learning Koollab Learning Management System: version 5.3.2. only

Published 2026-04-23. Last modified 2026-06-17.