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Medium · 4.8 CVE-2026-63237 EUVD-2026-50132GHSA-8j44-5653-q846

TOTP two-factor authentication bypass vulnerability

Published Jul 29, 2026 · Updated Jul 29, 2026 · Assigned by CSA

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.

Affected products

VendorProductAffectedFixed
Three Learning Koollab LMS 5.3.2 —

References