CVE-2026-14826: CWE-639 Authorization Bypass Through User-Controlled Key in Quiz and Survey Master (QSM)
A vulnerability in the Quiz and Survey Master (QSM) WordPress plugin before version 11.2.4 allows users with contributor-level access and above to bypass authorization checks on certain REST API routes. This flaw permits these users to read email-notification and results-page configurations of quizzes created by other users, potentially exposing notification recipient addresses. The issue is due to missing per-object ownership verification on these REST endpoints.
AI Analysis
Technical Summary
CVE-2026-14826 is an authorization bypass vulnerability in the Quiz and Survey Master (QSM) WordPress plugin versions before 11.2.4. The plugin fails to enforce per-object ownership checks on REST API routes that return quiz email-notification and results-page configurations. As a result, users with contributor-level privileges or higher can access configuration data, including notification recipient addresses, of quizzes they do not own. This vulnerability is classified under CWE-639 (Authorization Bypass Through User-Controlled Key).
Potential Impact
The vulnerability allows users with contributor-level access or higher to read sensitive configuration details of quizzes created by other users, including email notification recipient addresses. This exposure could lead to privacy concerns or targeted phishing but does not allow modification or denial of service. The CVSS score is low (2.7), reflecting limited confidentiality impact and no integrity or availability impact.
Mitigation Recommendations
Upgrade the Quiz and Survey Master (QSM) plugin to version 11.2.4 or later, where this authorization bypass vulnerability has been fixed. No other mitigation is necessary once the plugin is updated.
CVE-2026-14826: CWE-639 Authorization Bypass Through User-Controlled Key in Quiz and Survey Master (QSM)
Description
A vulnerability in the Quiz and Survey Master (QSM) WordPress plugin before version 11.2.4 allows users with contributor-level access and above to bypass authorization checks on certain REST API routes. This flaw permits these users to read email-notification and results-page configurations of quizzes created by other users, potentially exposing notification recipient addresses. The issue is due to missing per-object ownership verification on these REST endpoints.
CVSS v3.1
Score 2.7low
Affected software
Quiz and Survey Master (QSM)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-14826 is an authorization bypass vulnerability in the Quiz and Survey Master (QSM) WordPress plugin versions before 11.2.4. The plugin fails to enforce per-object ownership checks on REST API routes that return quiz email-notification and results-page configurations. As a result, users with contributor-level privileges or higher can access configuration data, including notification recipient addresses, of quizzes they do not own. This vulnerability is classified under CWE-639 (Authorization Bypass Through User-Controlled Key).
Potential Impact
The vulnerability allows users with contributor-level access or higher to read sensitive configuration details of quizzes created by other users, including email notification recipient addresses. This exposure could lead to privacy concerns or targeted phishing but does not allow modification or denial of service. The CVSS score is low (2.7), reflecting limited confidentiality impact and no integrity or availability impact.
Mitigation Recommendations
Upgrade the Quiz and Survey Master (QSM) plugin to version 11.2.4 or later, where this authorization bypass vulnerability has been fixed. No other mitigation is necessary once the plugin is updated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-07-06T08:45:48.527Z
- State
- PUBLISHED
Threat ID: 6a854e91c6e8be033248b261
Added to database: 08/19/2026, 06:34:57 UTC
Last enriched: 09/11/2026, 10:03:12 UTC
Last updated: 10/02/2026, 14:46:05 UTC
Views: 70
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