Cross-site scripting in Nx Witness VMS Web Administration allows session token exfiltration via a rogue peer site name

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-78414
StatePUBLISHED
AssignerNX
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-24 15:16:48 UTC
Updated2026-08-24 15:16:48 UTC
DescriptionCross-site scripting in the Web Administration interface of Network Optix Nx Witness VMS before version 6.1.3 on Linux, Windows and MacOS allows an adjacent-network attacker to execute arbitrary JavaScript in the browser of an authenticated administrator and steal the administrator's session token, resulting in Administrator Account Takeover. An attacker who controls an Nx server on the same network segment can set that server's site name to a script payload, which executes when an administrator opens the "Merge with Another Site" dialog and the site selection list is displayed.Solution: Update to Nx Witness VMS version 6.1.3 or later.

Risk And Classification

Primary CVSS: v3.1 8 HIGH from 96d4e157-0bf0-48b3-8efd-382c68caf4e0

CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.196d4e157-0bf0-48b3-8efd-382c68caf4e0Secondary8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNACVSS8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Network Optix Nx Witness VMS affected 6.1.3 semver Linux, Windows, MacOS

References

ReferenceSourceLinkTags
support.networkoptix.com/hc/en-us/articles/42950508518679-Security-Advisory-Cross-Site... 96d4e157-0bf0-48b3-8efd-382c68caf4e0 support.networkoptix.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Matan Sandori and 2Bsecure (en)

Additional Advisory Data

Solutions

CNA: Update to Nx Witness VMS version 6.1.3 or later.

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