CVE-2026-81196: CWE-639 Authorization Bypass Through User-Controlled Key in MasterStudy LMS WordPress Plugin
Description
CVE-2026-81196 is a low severity vulnerability in the MasterStudy LMS WordPress Plugin before version 3.7.46. It allows users with instructor access to bypass authorization checks and read quiz questions belonging to other instructors, including correct answers and explanations. This occurs because the plugin does not properly verify ownership of quiz question identifiers.
CVSS v3.1
Score 2.7low
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The MasterStudy LMS WordPress Plugin versions prior to 3.7.46 contain an authorization bypass vulnerability (CWE-639) where instructor-level users can access quiz questions of other instructors. The flaw arises from insufficient verification of user ownership over quiz question identifiers, enabling unauthorized read access to sensitive quiz content such as correct answers and explanations. The vulnerability has a CVSS 3.1 base score of 2.7, indicating low impact, with network attack vector, low complexity, and requiring high privileges (instructor access).
Potential Impact
An attacker with instructor privileges can read quiz questions and their correct answers created by other instructors. This could lead to unauthorized disclosure of quiz content but does not affect integrity or availability. The impact is limited to confidentiality of quiz question data within the LMS plugin.
Mitigation Recommendations
No official patch or fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict instructor access to trusted users only and monitor for suspicious access patterns related to quiz content.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-7j6v-48vm-cmrx
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-81196"]
- Database Specific Severity
- LOW
- Cvss Version
- 3.1
Threat ID: 6a98452aacd9273b496aa79e
Added to database: 09/02/2026, 15:47:54 UTC
Last enriched: 09/08/2026, 02:38:20 UTC
Last updated: 10/16/2026, 06:48:19 UTC
Views: 32
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