CVE-2026-100305 TDuck survey form through 6.0 Fill-In Restriction Bypass via Authenticated Submission Endpoint
Authenticated attackers can bypass form restrictions to submit unlimited entries, falsifying survey results in TDuck survey form.
- 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-2026-100305?
CVE-2026-100305 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 fails to enforce form fill-in restrictions on the authenticated submission endpoint POST /user/form/data/create. Authenticated attackers who know a form's key can submit unlimited entries to any form, bypassing publish status, time window, quota, and per-IP restrictions to falsify collected results.
Weakness: CWE-862
Which versions are affected by CVE-2026-100305?
How do I fix CVE-2026-100305?
No fix has been published for CVE-2026-100305 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-2026-100305 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100305 exists.
Sources
Also known as GHSA-6w6p-j4gp-7cph.