Vulnerability in Tduckcloud Tduck-Survey-Form
CVE-2026-100306
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.2% 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
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)
- VulnCheck Advisory: TDuck survey form through 6.0 Write Password Bypass via Client-Side Enforcement (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100306?
- CVE-2026-100306 is a medium-severity vulnerability in Tduckcloud Tduck-Survey-Form, classified under CWE-602. CVSS score: 5.3/10. Published 2026-09-25.
- How severe is CVE-2026-100306?
- Medium severity. CVSS v3 base score is 5.3 out of 10.