CVE-2026-63238

MEDIUM

Three Learning Koollab Lms < 5.3.2 - Authentication Bypass

Title source: rule

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.

References (1)

Core 1

Core References

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

Scores

CVSS v3 6.5

EPSS 0.0022

EPSS Percentile 12.2%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-287

Status published

Products (1)

Three Learning/Koollab LMS 5.3.2

Published Jul 29, 2026

Tracked Since Jul 29, 2026