Information Disclosure Vulnerability in TDuck Survey Form by TDuckCloud
CVE-2026-100304

6MEDIUM

Key Information:

Vendor

Tduckcloud

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-100304?

The TDuck Survey Form 6.0 has a significant information disclosure issue wherein the FormAuthUtils.hasPermission method operates in a fail-open mode. This flaw allows authenticated users to access submissions from forms that are no longer valid. Specifically, when a user provides a dataId for a previously deleted form, they can retrieve orphaned submission data, which may include sensitive personal information. This vulnerability occurs due to improper checks in the system that fail to prevent unauthorized access after form deletion.

Affected Version(s)

tduck-survey-form 6.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-100304 - Proof of Concept

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:
6
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yaqi Chao
Mingsheng Lin
.