CVE-2026-63237

MEDIUM

Three Learning Koollab LMS - TOTP Two-Factor Authentication Bypass Vulnerability

Title source: rule

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.

References (1)

Core 1

Core References

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

Scores

CVSS v3 4.8

EPSS 0.0012

EPSS Percentile 1.9%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-347

Status published

Products (1)

Three Learning/Koollab LMS 5.3.2

Published Jul 29, 2026

Tracked Since Jul 29, 2026