CVE-2026-63237

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.

Score

CVSS 3.1 4.8 Medium

Status

Deferred - 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4

Published

2026-07-29

Last modified

2026-10-23

Weaknesses

CWE-347

Affected products

• Koollab Lms (Three Learning)

References

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