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CVE-2026-63240: Vulnerability in Three Learning Koollab LMS

0
Medium
VulnerabilityCVE-2026-63240cvecve-2026-63240
Published: 07/29/2026 (07/29/2026, 06:29:53 UTC)
Source: CVE Database V5
Vendor/Project: Three Learning
Product: 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

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected software

Three Learning

Koollab LMS

Affected versions
=5.3.2

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/05/2026, 15:05:56 UTC

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.

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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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