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CVE-2026-111621— TDuck Survey Form through 5.3 Missing Authorization via /user/form/setting/{key}

Quick assessment

Affected
TDuckCloud tduck-survey-form
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.

TDuck 调查表单 5.3 及更早版本存在授权缺失漏洞，允许任何已认证用户通过 接口读取其他表单所有者的原始表单设置。攻击者可利用公开填写链接中的 8 位表单密钥，获取表单写入密码、所有者通知邮箱以及微信 OpenID。

CVSS 4.3 · Medium EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
TDuckCloud tduck-survey-form ≤ 5.3 affected
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I. Basic Information for CVE-2026-111621

Vulnerability Information
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Vulnerability Title
TDuck Survey Form through 5.3 Missing Authorization via /user/form/setting/{key}
Source: CVE Program / CVE List V5
Vulnerability Description
TDuck Survey Form through 5.3 contains a missing authorization vulnerability that allows any authenticated user to read other owners' raw form settings via GET /user/form/setting/{key}. Attackers can supply the 8-character form key from a public fill link to obtain the form write password, owner notification e-mail, and WeChat openIds.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
TDuckCloud tduck-survey-form 0 ~ 5.3 -

II. Public POCs for CVE-2026-111621

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-111621

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Vendor Advisories for CVE-2026-111621 (1)

Security Blog Posts for CVE-2026-111621 (1)

Other References for CVE-2026-111621 (2)

IV. Related Vulnerabilities

Same product: tduck-survey-form
Same vendor: TDuckCloud
Same weakness: CWE-639

V. Comments for CVE-2026-111621

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