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VulnerabilityPublished

CVE-2026-63240: Three Learning Koollab LMS · Information Exposure

Affects Three Learning Koollab LMSSource CVE Database V5

0

Not known to be exploited · CVSS 4.3 Medium.

Data as of 28 Oct 2026, 05:11 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Three LearningKoollab LMSAffected
  • =5.3.2
Fixed in–

AI-suggested

Until an official fix is released, restrict access to the course status endpoint to trusted users only or implement additional access controls to prevent unauthorized answer disclosure.

Description

CVE-2026-63240 is an information disclosure vulnerability in Three Learning's Koollab LMS version 5.3.2. It allows an authenticated learner to retrieve correct quiz answers from the course status endpoint without legitimately completing the assessment. This compromises the integrity of assessments by exposing answers prematurely. The vulnerability has a medium severity rating with a CVSS score of 4.3.

References

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