CVE-2026-63237

TOTP two-factor authentication bypass vulnerability

Medium · published July 29, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
6.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00176 · 6.8th percentile
Published
2026-07-29T06:25Z
EPSS history
Timeline
  • 29 JUL 06:25Z
    TOTP two-factor authentication bypass vulnerability
    cvelistv5