What is CVE-2026-63238?

CVE-2026-63238 is a medium-severity vulnerability in Three Learning Koollab Lms, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-07-29.

How severe is CVE-2026-63238?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Three Learning Koollab Lms

CVE-2026-63238

An authentication bypass vulnerability in Koollab LMS allowed an unauthenticated attacker to take over any account, including administrator accounts, by supplying a valid user UUID without providing primary credentials via the 2FA validati…

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.

Affected products

Three Learning Koollab Lms — versions 5.3.2

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

5f57b9bf-260d-4433-bf07-b6a79e9bb7d4

Frequently asked questions

What is CVE-2026-63238?: CVE-2026-63238 is a medium-severity vulnerability in Three Learning Koollab Lms, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-07-29.
How severe is CVE-2026-63238?: Medium severity. CVSS v3 base score is 6.5 out of 10.