---
id: CVE-2025-40899
title: >-
  A Stored Cross-Site Scripting vulnerability was discovered in the Assets and
  Nodes functionality due to improper validation of an input parameter
summary: >-
  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 co…
severity: high
cvss: 8.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:H'
cwe:
  - CWE-79
published: '2026-04-15'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-40899'
references:
  - url: 'https://security.nozominetworks.com/NN-2026:2-01'
    label: prodsec@nozominetworks.com
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-827968.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.00288
epssPercentile: 0.19738
ingestedAt: '2026-10-14T13:30:58.480Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.