---
cve: "CVE-2026-100303"
severity: "MEDIUM"
cvss: 5.3
epss: "0.3%"
vendor: "TDuckCloud"
kev: false
exploited: false
published: "2026-09-25 19:16:50"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-27T17:57:24+02:00"
---

# CVE-2026-100303

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://github.com/LinYuanyi1/cve-request-poc/blob/adffc39b78cad18cd489cbf7454853bf0f744b7f/tduck/poc_form_theme_write.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/FormThemeController.java#L61-L120>
- <https://www.vulncheck.com/advisories/tduck-survey-form-through-6.0-missing-authorization-in-form-theme-management-endpoints>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-100303) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_