CVE-2026-92567

MEDIUM 6.5

TDuck survey form through 5.0 Unauthorized Data Modification

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

TDuck survey form through version 5.0 contains an authorization bypass vulnerability in the POST /user/form/data/update endpoint that allows authenticated users to overwrite other users' form submission data. Attackers can discover submission identifiers allocated in narrow ranges and modify arbitrary form responses containing personal data by sending update requests without ownership validation.

CWE	CWE-639
Vendor	tduckcloud
Product	tduck-survey-form
Published	Sep 16, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Affected Versions

TDuckCloud / tduck-survey-form

0 ≤ 5.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/TDuckCloud/tduck-survey-form/issues/39 github.com: https://github.com/TDuckCloud/tduck-survey-form github.com: https://github.com/TDuckCloud/tduck-survey-form/blob/9ad4e2dc75cdff5eacc8be0c73f0d4db3c265d43/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormResultController.java#L198-L207 github.com: https://github.com/TDuckCloud/tduck-survey-form/blob/9ad4e2dc75cdff5eacc8be0c73f0d4db3c265d43/tduck-form/src/main/java/com/tduck/cloud/form/service/impl/UserFormDataServiceImpl.java#L158-L167 vulncheck.com: https://www.vulncheck.com/advisories/tduck-survey-form-through-5.0-unauthorized-data-modification

Credits

🔍 George Chen