---
id: CVE-2026-100303
title: >-
  TDuck survey form through 6.0 lacks authorization checks on
  FormThemeController write endpoints for global form themes and categories
summary: >-
  TDuck survey form through 6.0 lacks authorization checks on
  FormThemeController write endpoints for global form themes and categories.
  Authenticated non-admin users can add, modify, or delete themes and theme
  categories affecting forms o…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-862
vendor: TDuckCloud
product: tduck-survey-form
affected:
  - tduck-survey-form <= 6.0
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T19:16:50.423'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100303'
references:
  - url: >-
      https://github.com/LinYuanyi1/cve-request-poc/blob/adffc39b78cad18cd489cbf7454853bf0f744b7f/tduck/poc_form_theme_write.py
    label: disclosure@vulncheck.com
  - url: 'https://github.com/TDuckCloud/tduck-survey-form'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/FormThemeController.java#L61-L120
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/tduck-survey-form-through-6.0-missing-authorization-in-form-theme-management-endpoints
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T19:15:38.966Z'
---

## Overview

TDuck survey form through 6.0 lacks authorization checks on FormThemeController write endpoints for global form themes and categories. Authenticated non-admin users can add, modify, or delete themes and theme categories affecting forms owned by other users.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.