Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.0
Summary
| CVE | CVE-2025-40899 |
|---|---|
| State | PUBLISHED |
| Assigner | Nozomi |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-04-15 09:16:30 UTC |
| Updated | 2026-05-12 13:17:19 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 7.1 HIGH from [email protected]
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: 0.000350000 probability, percentile 0.102610000 (date 2026-05-12)
Problem Types: CWE-79 | CWE-79 CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 7.1 | HIGH | 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/E:X/C... |
| 4.0 | CNA | CVSS | 7.1 | HIGH | 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 |
| 3.1 | [email protected] | Secondary | 8.9 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:H |
| 3.1 | CNA | CVSS | 8.9 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:H |
CVSS v4.0 Breakdown
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Nozomi Networks | Guardian | affected 26.0.0 semver | Not specified |
| CNA | Nozomi Networks | CMC | affected 26.0.0 semver | Not specified |
| ADP | Siemens | RUGGEDCOM APE1808 | affected * custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| cert-portal.siemens.com/productcert/html/ssa-827968.html | 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e | cert-portal.siemens.com | |
| security.nozominetworks.com/NN-2026:2-01 | [email protected] | security.nozominetworks.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: This issue was found by Andrea Palanca of Nozomi Networks Product Security team during an internal investigation. (en)
Additional Advisory Data
Solutions
CNA: Upgrade to v26.0.0 or later.
Workarounds
CNA: Use internal firewall features to limit access to the web management interface.
CNA: Review all accounts with access to it and delete unnecessary ones.
CNA: Review existing custom fields.