CVE-2026-9230: CWE-862 Missing Authorization in expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker
The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 11.1.4. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to modify quizzes they do not own, overwrite quiz results pages, and reroute quiz-result notification emails to attacker-controlled addresses. An attacker first calls the /quiz/structure endpoint with an arbitrary victim quiz ID to obtain a valid nonce bound to that quiz ID and their own user ID, then presents that nonce to the /quizzes/{id}/emails save endpoint, which accepts it without verifying quiz ownership.
AI Analysis
Technical Summary
CVE-2026-9230 is an authorization bypass vulnerability in the Quiz and Survey Master (QSM) WordPress plugin up to version 11.1.4. The vulnerability stems from improper authorization checks when processing requests to the /quiz/structure and /quizzes/{id}/emails endpoints. An attacker with contributor-level privileges can obtain a nonce tied to a victim's quiz ID and their own user ID, then use this nonce to modify quiz emails without verifying ownership. This enables unauthorized modification of quizzes, overwriting of quiz result pages, and rerouting of notification emails to attacker-controlled addresses.
Potential Impact
The vulnerability allows authenticated users with contributor-level access or higher to perform unauthorized modifications to quizzes they do not own, including changing quiz content, overwriting result pages, and redirecting notification emails. This can lead to integrity issues in quiz data and potential information disclosure or phishing via manipulated email notifications. There is no direct impact on confidentiality or availability reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level access to trusted users only and monitor for suspicious activity related to quiz modifications. Avoid granting contributor or higher privileges to untrusted users. Follow vendor updates for patches addressing this authorization bypass.
CVE-2026-9230: CWE-862 Missing Authorization in expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker
Description
The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 11.1.4. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to modify quizzes they do not own, overwrite quiz results pages, and reroute quiz-result notification emails to attacker-controlled addresses. An attacker first calls the /quiz/structure endpoint with an arbitrary victim quiz ID to obtain a valid nonce bound to that quiz ID and their own user ID, then presents that nonce to the /quizzes/{id}/emails save endpoint, which accepts it without verifying quiz ownership.
CVSS v3.1
Score 4.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-9230 is an authorization bypass vulnerability in the Quiz and Survey Master (QSM) WordPress plugin up to version 11.1.4. The vulnerability stems from improper authorization checks when processing requests to the /quiz/structure and /quizzes/{id}/emails endpoints. An attacker with contributor-level privileges can obtain a nonce tied to a victim's quiz ID and their own user ID, then use this nonce to modify quiz emails without verifying ownership. This enables unauthorized modification of quizzes, overwriting of quiz result pages, and rerouting of notification emails to attacker-controlled addresses.
Potential Impact
The vulnerability allows authenticated users with contributor-level access or higher to perform unauthorized modifications to quizzes they do not own, including changing quiz content, overwriting result pages, and redirecting notification emails. This can lead to integrity issues in quiz data and potential information disclosure or phishing via manipulated email notifications. There is no direct impact on confidentiality or availability reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level access to trusted users only and monitor for suspicious activity related to quiz modifications. Avoid granting contributor or higher privileges to untrusted users. Follow vendor updates for patches addressing this authorization bypass.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-05-21T18:35:49.663Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a476a1627e9c79719455c06
Added to database: 07/03/2026, 07:51:50 UTC
Last enriched: 07/10/2026, 08:50:26 UTC
Last updated: 08/16/2026, 12:41:11 UTC
Views: 73
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