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

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Summary

CVECVE-2026-9230
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-03 08:16:25 UTC
Updated2026-07-03 08:16:25 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Expresstech Quiz And Survey Master QSM Easy Quiz And Survey Maker affected 11.1.4 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/php/rest-api.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/php/rest-api.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/blocks/block.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/php/rest-api.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/49c66f9e-e58c-435b-9bb0-d6b66... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/blocks/block.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/blocks/block.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/php/rest-api.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/php/rest-api.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/mlw_quizmaster2.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/mlw_quizmaster2.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/php/rest-api.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/blocks/block.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Kirasec (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-07-02T18:30:42.000ZDisclosed
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