CVE-2025-15479Network attack vector

Browser session theft via unencoded survey content

Published Jan 7, 2026 · Updated Jan 7, 2026

Stored XSS in ngSurvey Enterprise 3.6.4 through 3.6.16 allows remote authenticated users to run JavaScript in other users' browsers. The survey content and administration renderer outputs crafted survey content without proper encoding, causing stored script markup to execute when another user views it. Survey creation or edit privileges are required; a victim must view the content, after which the script can steal session information and perform unauthorized actions in that user's context.

CVSS severity5.1
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in ngSurvey Enterprise 3.6.4 through 3.6.16 allows remote authenticated users to run JavaScript in other users' browsers. The survey content and administration renderer outputs crafted survey content without proper encoding, causing stored script markup to execute when another user views it. Survey creation or edit privileges are required; a victim must view the content, after which the script can steal session information and perform unauthorized actions in that user's context.

The record

CVE
CVE-2025-15479
Published
Jan 7, 2026
Updated
Jan 7, 2026
Vendor
Data Illusion Zumbrunn
Product
ngSurvey
Classifications
CWE-79, CAPEC-63, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.6.4 <3.6.17 changes=[{"at":"3.6.17","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Data Illusion Zumbrunn · ngSurveyversion=3.6.4 <3.6.17 changes=[{"at":"3.6.17","status":"unaffected"}]

Published CVSS scores

5.1TCS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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