CVE-2026-63236: Three Learning Koollab Lms

Low severity, CVSS 3.7. EPSS: 0.3% chance of exploitation in the next 30 days.

An improper access control vulnerability in Koollab LMS allowed an unauthenticated attacker to read another user's name, internal identifier, scores, lesson status, lesson position, and cached lesson state via the SCORM API endpoint.

Affected products

• Three Learning Koollab Lms: version 5.3.2 only

Published 2026-07-29. Last modified 2026-07-30.