CVE-2026-63240: Vulnerability in Three Learning Koollab LMS
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.
AI Analysis
Technical Summary
This vulnerability in Koollab LMS (version 5.3.2) permits authenticated learners to access correct quiz answers via the course status endpoint without completing the quiz as intended. The flaw results in unauthorized information disclosure, specifically leaking correct answers that should remain confidential until assessment completion. The issue is categorized under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). No official patch or remediation guidance is currently available from the vendor, and there are no known exploits in the wild.
Potential Impact
The vulnerability allows unauthorized disclosure of correct quiz answers to authenticated learners, undermining the integrity of assessments. It does not affect system availability or integrity beyond the exposure of sensitive information. There is no indication of privilege escalation or remote unauthenticated exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. 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.
CVE-2026-63240: Vulnerability in Three Learning Koollab LMS
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.
CVSS v3.1
Score 4.3medium
Affected software
Three Learning
Koollab LMS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Koollab LMS (version 5.3.2) permits authenticated learners to access correct quiz answers via the course status endpoint without completing the quiz as intended. The flaw results in unauthorized information disclosure, specifically leaking correct answers that should remain confidential until assessment completion. The issue is categorized under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). No official patch or remediation guidance is currently available from the vendor, and there are no known exploits in the wild.
Potential Impact
The vulnerability allows unauthorized disclosure of correct quiz answers to authenticated learners, undermining the integrity of assessments. It does not affect system availability or integrity beyond the exposure of sensitive information. There is no indication of privilege escalation or remote unauthenticated exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. 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.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CSA
- Date Reserved
- 2026-07-16T02:35:54.249Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a699fbc9c2644c7f814ebba
Added to database: 07/29/2026, 06:37:48 UTC
Last enriched: 08/05/2026, 15:05:56 UTC
Last updated: 09/12/2026, 10:01:32 UTC
Views: 69
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