CVE-2026-100306

MEDIUM 5.3

TDuck survey form through 6.0 Write Password Bypass via Client-Side Enforcement

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

TDuck survey form through 6.0 fails to validate write passwords on submission endpoints, enforcing the check only on the front end. Remote unauthenticated attackers can submit form entries directly to public submission APIs without providing the password by using the form key from share links.

CWE	CWE-602
Vendor	tduckcloud
Product	tduck-survey-form
Published	Sep 25, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

TDuckCloud / tduck-survey-form

0 ≤ 6.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/LinYuanyi1/cve-request-poc/blob/adffc39b78cad18cd489cbf7454853bf0f744b7f/tduck/poc_form_data_create_bypass.py github.com: https://github.com/TDuckCloud/tduck-survey-form github.com: https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormSettingController.java#L154-L162 github.com: https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormResultController.java#L152-L172 vulncheck.com: https://www.vulncheck.com/advisories/tduck-survey-form-through-6.0-write-password-bypass-via-client-side-enforcement

Credits

Yaqi Chao Mingsheng Lin