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    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:Sep 25, 2026
    Last Modified:Sep 29, 2026
    EPS:Sep 25, 2026
    EPSS Score:0.00352
    CVSS Score:5.3

    Affected Products

    Vendor
    Tduckcloud
    Product
    Tduck-survey-form

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-636 Not Failing Securely

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-111621 (CVSS 5.3) — TDuck Survey Form through 5.3 contains a missing authorization vulnerability that allows any authenticated use…
    CVE-2026-109167 (CVSS 5.3) — TDuck survey form through 6.0 contains an insecure direct object reference vulnerability in the saveFormTheme …
    CVE-2026-109165 (CVSS 5.3) — TDuck survey form through 6.0 contains a broken access control vulnerability that allows authenticated users t…
    CVE-2026-109164 (CVSS 7.1) — TDuck survey form through 6.0 contains an insecure direct object reference vulnerability that allows authentic…
    CVE-2026-100306 (CVSS 6.9) — TDuck survey form through 6.0 fails to validate write passwords on submission endpoints, enforcing the check o…
    CVE-2026-100305 (CVSS 5.3) — TDuck survey form through 6.0 fails to enforce form fill-in restrictions on the authenticated submission endpo…
    CVE-2026-100303 (CVSS 5.3) — TDuck survey form through 6.0 lacks authorization checks on FormThemeController write endpoints for global for…
    CVE-2026-92602 (CVSS 7.1) — TDuck survey form through version 5.3 fails to validate webhook URLs or verify form ownership in the WebhookCo…
    CVE-2026-92567 (CVSS 7.1) — TDuck survey form through version 5.0 contains an authorization bypass vulnerability in the POST /user/form/da…

    References

    https://github.com/LinYuanyi1/cve-request-poc/blob/adffc39b78cad18cd489cbf7454853bf0f744b7f/tduck/poc_form_data_details_orphan.py
    https://github.com/TDuckCloud/tduck-survey-form
    https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormController.java#L451-L459
    https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-form/src/main/java/com/tduck/cloud/form/service/impl/UserFormDataServiceImpl.java#L169-L187
    https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-form/src/main/java/com/tduck/cloud/form/util/FormAuthUtils.java#L25-L39
    https://www.vulncheck.com/advisories/tduck-survey-form-6.0-information-disclosure-via-fail-open-form-ownership-check

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High