Vulnerability · Published Jan 7, 2026 · Assigned by TCS-CERT

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

Medium 5.1

In plain English

A medium-severity cross-site scripting in NGSurvey from Data Illusion Zumbrunn. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).

Severity (CVSS 4.0)5.1Medium

Exploit odds (30 days)0.2%top 90.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Data Illusion Zumbrunn	NGSurvey	3.6.4 – before 3.6.17

Weakness: CWE-79 · 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

References

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