CVE-2026-63238CWE-287

CVE-2026-63238

Medium · published July 29, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
26.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00341 · 26.3th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-07-29T11:16Z
References (1)
https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/ · 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4
EPSS history
Timeline
  • 29 JUL 06:27Z
    Authentication bypass vulnerability
    cvelistv5