NGSurvey Enterprise 3.6.4 incorrect authorization exposes other users’ API keys and personal data

5.1 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Thomas Clair

References

Affected Vendor

Data Illusion Zumbrunn

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Affected Software

NGSurvey

Vulnerable Versions:

3.6.4

Timeline

Official Publish: January 7th, 2026

Last Modified: January 7th, 2026

Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.