CVE-2026-63237 — TOTP two-factor authentication bypass vulnerability

CVE-2026-63237

TOTP two-factor authentication bypass vulnerability PUBLISHED

Description (CNA)

A TOTP two-factor authentication bypass vulnerability in Koollab LMS allowed an attacker to supply a client-controlled seed to generate a matching one-time password and bypass the second authentication factor, potentially enabling unauthorised access to administrator accounts.

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.