Authentication Bypass in TDuck Survey Form by TDuckCloud
CVE-2026-100305

5.3MEDIUM

Key Information:

Vendor

Tduckcloud

Status
Tduck-survey-form
Vendor
CVE Published:
25 September 2026

Badges

👾 Exploit Exists

What is CVE-2026-100305?

The TDuck survey form prior to version 6.0 allows authenticated users to exploit a weakness in the submission endpoint. Attackers with knowledge of a form's key can bypass critical restrictions including publish status, time windows, and quotas, enabling them to submit an unlimited number of entries. This leads to potential manipulation of data results collected through the forms, posing significant risks to data integrity and accuracy.

Affected Version(s)

tduck-survey-form 0 <= 6.0

References

https://github.com/LinYuanyi1/cve-request-poc/blob/adffc3...
exploit
https://github.com/TDuckCloud/tduck-survey-form
product
https://github.com/TDuckCloud/tduck-survey-form/blob/43ff...
technical-description

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yaqi Chao
Mingsheng Lin
.