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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

CVSS 4.3 · Medium EPSS 0.30% · P22

Possible ATT&CK Techniques 1AI

T1098.004 · SSH Authorized Keys

Affected Version Matrix 1

VendorProductVersion RangeStatus
expresstechQuiz and Survey Master (QSM) – Easy Quiz and Survey Maker≤ 11.1.4affected
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I. Basic Information for CVE-2026-9230

Vulnerability Information
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Vulnerability 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
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker是expresstech的WordPress Quiz plugin。 WordPress Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker 11.1.4及之前版本存在授权问题漏洞，该漏洞源于插件未正确验证用户是否被授权执行操作，可能导致已通过身份验证且具有贡献者及以上访问权限的攻击者修改不属于自己的测验
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
expresstechQuiz and Survey Master (QSM) – Easy Quiz and Survey Maker 0 ~ 11.1.4 -

II. Public POCs for CVE-2026-9230

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III. Intelligence Information for CVE-2026-9230

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Patches & Fixes for CVE-2026-9230 (7)

Vendor Advisories for CVE-2026-9230 (1)

Other References for CVE-2026-9230 (3)

IV. Related Vulnerabilities

Same product: Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker
Same vendor: expresstech
Same weakness: CWE-862

V. Comments for CVE-2026-9230

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