CVE-2026-9230
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/blocks/block.php#L257
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/blocks/block.php#L424
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/mlw_quizmaster2.php#L890
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/php/rest-api.php#L460
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/php/rest-api.php#L513
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/php/rest-api.php#L862
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/blocks/block.php#L257
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/blocks/block.php#L424
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/mlw_quizmaster2.php#L890
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/php/rest-api.php#L460
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/php/rest-api.php#L513
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/11.1.2/php/rest-api.php#L862
- 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=
- https://www.wordfence.com/threat-intel/vulnerabilities/id/49c66f9e-e58c-435b-9bb0-d6b66261e789?source=cve
CWEs
CWE-862
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.