Medium severity · published Oct 16, 2026
CVE-2026-111621
TDuck Survey Form through 5.3 Missing Authorization via /user/form/setting/{key}
4.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TD
tduck-survey-form · TDuckCloud
through 5.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111621
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111621
github.com
https://github.com/TDuckCloud/tduck-survey-form
github.com
https://github.com/TDuckCloud/tduck-survey-form/blob/5.3/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormSettingController.java#L66-L75
github.com
https://github.com/TDuckCloud/tduck-survey-form/commit/984efd69f51778e3d1a9ea0feb0f7c9aed266c18
hackmd.io
https://hackmd.io/@hieuPenguinnn/tduck-survey-form-setting-cross-user-disclosure
www.vulncheck.com
https://www.vulncheck.com/advisories/tduck-survey-form-through-5.3-missing-authorization-via-user-form-setting-key
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