CVE-2026-63238 — Authentication bypass vulnerability

CVE-2026-63238

Authentication bypass vulnerability PUBLISHED

Description (CNA)

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 validation endpoint.

Affected (CNA)

Vendor / product	Versions
Three Learning / Koollab LMS	affected 5.3.2

CWE

No CWE identifiers supplied.

References

https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.