CVE-2026-63237 — MEDIUM (4.8)

Vulnerability Description

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.

CVSS Score

4.8

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-347

References

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

FAQ

What is CVE-2026-63237?

CVE-2026-63237 is a vulnerability with a CVSS score of 4.8 (MEDIUM). 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 authenticatio...

How severe is CVE-2026-63237?

CVE-2026-63237 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-63237?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.