EUVD-2026-50135
GHSA-9ch9-66pf-cjcf
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Low-privilege authentication required, network accessible, low complexity, and limited confidentiality impact only.
Primary rating from Vendor (CSA).
CVSS VectorVendor: CSA
Lifecycle Timeline
1DescriptionCVE.org
An information disclosure vulnerability in Koollab LMS allowed an authenticated learner to obtain correct quiz answers from the course status endpoint without completing the assessment legitimately, compromising the integrity of assessments.
AnalysisAI
Koollab LMS 5.3.2 exposes correct quiz answers through the course status endpoint to authenticated learners without requiring legitimate assessment completion. An attacker with a valid student account can retrieve answers and compromise exam integrity.
Technical ContextAI
The vulnerability resides in the Koollab LMS course status endpoint, which fails to restrict access to quiz answer data based on assessment completion status. This constitutes an information exposure flaw (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor). The affected product, identified by CPE cpe:2.3:a:three_learning:koollab_lms:*:*:*:*:*:*:*:*, is developed by Three Learning and is used for learning management scenarios.
RemediationAI
No specific patched version is noted in the provided data; consult the CSA advisory AL-2026-094 for vendor‑released remediation. As an interim workaround, restrict the course status endpoint so it only returns answer data after a user has legitimately submitted the assessment, or disable the endpoint for learners. Monitor logs for abnormal endpoint usage specific to quiz request patterns.
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Same weakness CWE-200 – Information Exposure
View allSame technique Information Disclosure
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External POC / Exploit Code
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