CVE-2026-63241: Three Learning Koollab Lms

Low severity, CVSS 3.1. EPSS: 0.2% chance of exploitation in the next 30 days.

An insecure direct object reference vulnerability in Koollab LMS allowed an authenticated user to query the course completion progress of any other user without authorisation, disclosing private learning progress information.

Affected products

• Three Learning Koollab Lms: version 5.3.2 only

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