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    CVE-2026-109167

    TDuck survey form through 6.0 contains an insecure direct object reference vulnerability in the saveFormTheme handler that allows authenticated users to overwrite other users' form themes. Attackers whose form has no theme can submit another form's sequential theme id with their own formKey, replacing its colours and image URLs and removing the victim's theme.

    Published:Oct 12, 2026
    Last Modified:Oct 14, 2026
    EPS:Oct 12, 2026
    EPSS Score:0.0019
    CVSS Score:4.3

    Affected Products

    Vendor
    Tduckcloud
    Product
    Tduck-survey-form

    Exploits

    No exploit reference

    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-2026-109165 (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-2026-100304 (CVSS 6) — TDuck survey form 6.0 contains an information disclosure vulnerability in FormAuthUtils.hasPermission that fai…
    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…

    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