CVE-2026-9230 json
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
published 2026-07-03 4 mo ago modified 2026-07-06 4 mo ago also EUVD-2026-41513
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 42%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected products
- expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/49c66f9e-e58c-435b-9bb0-d6b66261e789?source=cve
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/11.1.2/php/rest-api.php#L460
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/11.1.2/php/rest-api.php#L513
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/11.1.2/blocks/block.php#L424
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/11.1.2/blocks/block.php#L257
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/11.1.2/php/rest-api.php#L862
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/11.1.2/mlw_quizmaster2.php#L890
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/10.3.5/php/rest-api.php#L460
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/10.3.5/php/rest-api.php#L513
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/10.3.5/blocks/block.php#L424
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/10.3.5/blocks/block.php#L257
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/10.3.5/php/rest-api.php#L862
- plugins.trac.wordpress.org /browser/quiz-master-next/tags/10.3.5/mlw_quizmaster2.php#L890
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3570062%40quiz-master-next&new=3570062%40quiz-master-next&sfp_e
Sources
- CVE List CVE-2026-9230
- NVD CVE-2026-9230
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.