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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker unaffected
Version Status Constraints
0 affected ≤ 11.1.4

No data.

No data.

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Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/blocks/block.php#L257 cve-icon
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/blocks/block.php#L424 cve-icon
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/mlw_quizmaster2.php#L890 cve-icon
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/php/rest-api.php#L460 cve-icon
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/php/rest-api.php#L513 cve-icon
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/php/rest-api.php#L862 cve-icon
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/blocks/block.php#L257 cve-icon
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/blocks/block.php#L424 cve-icon
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/mlw_quizmaster2.php#L890 cve-icon
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/php/rest-api.php#L460 cve-icon
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/php/rest-api.php#L513 cve-icon
https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/php/rest-api.php#L862 cve-icon
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3570062%40quiz-master-next&new=3570062%40quiz-master-next&sfp_email=&sfph_mail= cve-icon
https://www.wordfence.com/threat-intel/vulnerabilities/id/49c66f9e-e58c-435b-9bb0-d6b66261e789?source=cve cve-icon
History

Fri, 03 Jul 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Expresstech
Expresstech quiz And Survey Master (qsm) – Easy Quiz And Survey Maker
Wordpress
Wordpress wordpress
Vendors & Products Expresstech
Expresstech quiz And Survey Master (qsm) – Easy Quiz And Survey Maker
Wordpress
Wordpress wordpress

Fri, 03 Jul 2026 08:00:00 +0000

Type Values Removed Values Added
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.
Title Quiz and Survey Master (QSM) <= 11.1.4 - Missing Authorization to Authenticated (Contributor+) Arbitrary Quiz Modification and Email Reroute via Leaked Nonce from /quiz/structure
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-07-03T06:50:11.170Z

Reserved: 2026-05-21T18:35:49.663Z

Link: CVE-2026-9230

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-03T09:30:04Z

Weaknesses