---
id: "CVE-2026-111621"
kind: "vulnerability"
aliases: ["CVE-2026-111621"]
title: "TDuck Survey Form: any logged-in user can read other owners' form settings"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "self-hosted", "survey-form", "tduck"]
not_affected_if: ["no-user-registration", "version-above-5.3"]
published_at: "2026-10-16T18:17:41+00:00"
first_seen_at: "2026-10-23T21:57:13+00:00"
updated_at: "2026-10-25T04:27:15+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111621", "first_seen_at": "2026-10-23T21:57:13+00:00"}]
---

# TDuck Survey Form: any logged-in user can read other owners' form settings

TDuck Survey Form through 5.3 lets any authenticated user call GET /user/form/setting/{key} and read another owner's raw form settings without an ownership check. An attacker who has the 8-character form key from a public fill link can obtain the form write password, the owner's notification e-mail and WeChat openIds.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether the TDuck Survey Form deployment is version 5.3 or earlier; the sources do not name a fixed version, so confirm against the project's release notes.
- Test that `GET /user/form/setting/{key}` with a non-owner account returns another owner's form settings, which indicates the flaw is present.

## Timeline

- 2026-10-23T21:57:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111621

## From the sources

TDuck Survey Form through 5.3 contains a missing authorization vulnerability that allows any authenticated user to read other owners' raw form settings via GET /user/form/setting/{key}. Attackers can supply the 8-character form key from a public fill link to obtain the form write password, owner notification e-mail, and WeChat openIds.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_