Vulnerability in Tduckcloud Tduck-Survey-Form
CVE-2026-100304
TDuck survey form 6.0 contains an information disclosure vulnerability in FormAuthUtils.hasPermission that fails open when a form does not exist, allowing authenticated users to access deleted form submissions. Attackers can read orphaned submission data including personal information by providing a known dataId to the GET /user/form/data/details endpoint after the form has been permanently deleted.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Tduckcloud Tduck-Survey-Form — versions 6.0
Weakness classification (CWE)
References
- github.com/LinYuanyi1/cve-request-poc/blob/adffc39b78cad18cd489cbf7454853bf0f74… (exploit)
- github.com/TDuckCloud/tduck-survey-form (product)
- github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bba… (technical-description)
- github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bba… (technical-description)
- github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bba… (technical-description)
- VulnCheck Advisory: TDuck survey form 6.0 Information Disclosure via Fail-Open Form Ownership Check (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100304?
- CVE-2026-100304 is a medium-severity vulnerability in Tduckcloud Tduck-Survey-Form, classified under CWE-636. CVSS score: 5.3/10. Published 2026-09-25.
- How severe is CVE-2026-100304?
- Medium severity. CVSS v3 base score is 5.3 out of 10.