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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 …

Medium CVSS 6.5
CVECVE-2026-63238
First seen2026-07-29 08:15 UTC
Disclosed2026-07-29 07:16 UTC
Last updated2026-07-29 08:15 UTC
Channel statusauto

Summary

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.

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