Vulnerability · Published Sep 25, 2026 · Assigned by VulnCheck
CVE-2026-100303TDuck survey form through 6.0 Missing Authorization in Form Theme Management Endpoints
Medium 5.4
In plain English
A medium-severity missing authorization in tduck-survey-form from TDuckCloud. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.3%top 79.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
TDuck survey form through 6.0 lacks authorization checks on FormThemeController write endpoints for global form themes and categories. Authenticated non-admin users can add, modify, or delete themes and theme categories affecting forms owned by other users.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| TDuckCloud | tduck-survey-form | 0 – through 6.0 |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
References
- https://github.com/LinYuanyi1/cve-request-poc/blob/adffc39b78cad18cd489cbf7454853bf0f744b7f/tduck/poc_form_theme_write.py exploit
- https://github.com/TDuckCloud/tduck-survey-form product
- https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/FormThemeController.java#L61-L120 technical-description
- VulnCheck Advisory: TDuck survey form through 6.0 Missing Authorization in Form Theme Management Endpoints third-party-advisory