CVE-2026-63238 — MEDIUM (6.5)

Vulnerability Description

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.

CVSS Score

6.5

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-287

References

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

FAQ

What is CVE-2026-63238?

CVE-2026-63238 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 p...

How severe is CVE-2026-63238?

CVE-2026-63238 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-63238?

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