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CVE-2026-11780— Quiz and Survey Master (QSM) <= 11.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'question_title' Parameter

Quick assessment

Affected
expresstech Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Quiz and Survey Master是WordPress基金会开源的一款免费的测验和调查制作工具。 WordPress Quiz and Survey Master 11.2.1及之前版本存在跨站脚本漏洞，该漏洞源于对question_title参数的输入清理和输出转义不足，可能导致具有贡献者级别及以上权限的认证攻击者注入任意Web脚本，当用户访问被注入页面时执行。

CVSS 6.4 · Medium EPSS 0.42% · P34

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 1

VendorProduct Version RangeStatus
expresstech Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker ≤ 11.2.1 affected
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I. Basic Information for CVE-2026-11780

Vulnerability Information
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Vulnerability Title
Quiz and Survey Master (QSM) <= 11.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'question_title' Parameter
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 Stored Cross-Site Scripting via the 'question_title' parameter in all versions up to, and including, 11.2.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Quiz and Survey Master 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Quiz and Survey Master是WordPress基金会开源的一款免费的测验和调查制作工具。 WordPress Quiz and Survey Master 11.2.1及之前版本存在跨站脚本漏洞，该漏洞源于对question_title参数的输入清理和输出转义不足，可能导致具有贡献者级别及以上权限的认证攻击者注入任意Web脚本，当用户访问被注入页面时执行。
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

Vendor Product Affected Versions CPE Subscribe
expresstech Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker 0 ~ 11.2.1 -

II. Public POCs for CVE-2026-11780

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III. Intelligence Information for CVE-2026-11780

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Patches & Fixes for CVE-2026-11780 (2)

Vendor Advisories for CVE-2026-11780 (1)

IV. Related Vulnerabilities

Same product: Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker
Same vendor: expresstech
Same weakness: CWE-79

V. Comments for CVE-2026-11780

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