Description
TDuck survey form 6.0 contains an information disclosure vulnerability in FormAuthUtils.hasPermission that fails open when a form does not exist, allowing authenticated users to access deleted form submissions. Attackers can read orphaned submission data including personal information by providing a known dataId to the GET /user/form/data/details endpoint after the form has been permanently deleted.
References6
- github.com/LinYuanyi1/cve-request-poc/blob/adffc39b78cad18cd489…
- github.com/TDuckCloud/tduck-survey-form
- github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc…
- github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc…
- github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc…
- www.vulncheck.com/advisories/tduck-survey-form-6.0-information-…
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 4.0
-
6.0
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 29 · as of 9 November 2026
- CWE
- CWE-636
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.