Description
A Stored Cross-Site Scripting vulnerability was discovered in the Assets and Nodes functionality due to improper validation of an input parameter. An authenticated user with custom fields privileges can define a malicious custom field containing a JavaScript payload. When the victim views the Assets or Nodes pages, the XSS executes in their browser context, allowing the attacker to perform unauthorized actions as the victim, such as modify application data, disrupt application availability, and access limited sensitive information.
Published: 2026-04-15
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: Stored Cross‑Site Scripting that allows an attacker to execute code in the victim's browser and perform unauthorized actions such as data modification, disruption, and limited data disclosure
Action: Immediate Patch
AI Analysis

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Remediation

Vendor Solution

Upgrade to v26.0.0 or later.


Vendor Workaround

Use internal firewall features to limit access to the web management interface.

Tracking

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Advisories

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History

Tue, 12 May 2026 13:30:00 +0000

Type Values Removed Values Added
References

Wed, 15 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 15 Apr 2026 09:00:00 +0000

Type Values Removed Values Added
Description A Stored Cross-Site Scripting vulnerability was discovered in the Assets and Nodes functionality due to improper validation of an input parameter. An authenticated user with custom fields privileges can define a malicious custom field containing a JavaScript payload. When the victim views the Assets or Nodes pages, the XSS executes in their browser context, allowing the attacker to perform unauthorized actions as the victim, such as modify application data, disrupt application availability, and access limited sensitive information.
Title Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.0
First Time appeared Nozomi Networks
Nozomi Networks cmc
Nozomi Networks guardian
Weaknesses CWE-79
CPEs cpe:2.3:a:nozomi_networks:cmc:*:*:*:*:*:*:*:*
cpe:2.3:a:nozomi_networks:guardian:*:*:*:*:*:*:*:*
Vendors & Products Nozomi Networks
Nozomi Networks cmc
Nozomi Networks guardian
References
Metrics cvssV3_1

{'score': 8.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L'}


Subscriptions

Nozomi Networks Cmc Guardian
cve-icon MITRE

Status: PUBLISHED

Assigner: Nozomi

Published:

Updated: 2026-05-12T12:08:09.687Z

Reserved: 2025-04-16T09:04:35.923Z

Link: CVE-2025-40899

cve-icon Vulnrichment

Updated: 2026-04-15T13:20:18.993Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-15T09:16:30.837

Modified: 2026-05-12T13:17:19.423

Link: CVE-2025-40899

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-15T13:49:14Z

Weaknesses