CVE-2026-100304CWE-636

CVE-2026-100304

Medium · published September 25, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
27.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
6.0 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00352 · 27.6th percentile
Weakness
CWE-636 · Not Failing Securely ('Failing Open')
Published
2026-09-25T23:16Z
References (6)
https://github.com/LinYuanyi1/cve-request-poc/blob/adffc39b78cad18cd489cbf7454853bf0f744b7f/tduck/poc_form_data_details_orphan.py · [email protected]https://github.com/TDuckCloud/tduck-survey-form · [email protected]https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormController.java#L451-L459 · [email protected]https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-form/src/main/java/com/tduck/cloud/form/service/impl/UserFormDataServiceImpl.java#L169-L187 · [email protected]https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-form/src/main/java/com/tduck/cloud/form/util/FormAuthUtils.java#L25-L39 · [email protected]https://www.vulncheck.com/advisories/tduck-survey-form-6.0-information-disclosure-via-fail-open-form-ownership-check · [email protected]
EPSS history
Timeline
  • 27 SEP 03:24Z
    EPSS moved — → 0%
    epss
  • 25 SEP 18:47Z
    TDuck survey form 6.0 Information Disclosure via Fail-Open Form Ownership Check
    cvelistv5