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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 authenticati…

Medium CVSS 4.8
CVECVE-2026-63237
First seen2026-07-29 08:15 UTC
Disclosed2026-07-29 07:16 UTC
Last updated2026-07-29 08:15 UTC
Channel statusauto

Summary

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.

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Lint boundary warnings (1)

The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD