CVE-2026-100303 TDuck survey form through 6.0 Missing Authorization in Form Theme Management Endpoints
Authenticated non-admin users can modify or delete global form themes and categories, affecting other users' forms.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-100303?
CVE-2026-100303 is a medium-severity missing authorization vulnerability in TDuckCloud tduck-survey-form, published on 25 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-100303?
How do I fix CVE-2026-100303?
No fix has been published for CVE-2026-100303 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-100303 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100303 exists.
Sources
Also known as GHSA-47j6-wrmm-xx5g.