CVE-2025-40899 HIGH

CVE-2025-40899: Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.0

Vendor Nozomi Networks
Product Guardian
Weakness CWE-79 · XSS
Published April 15, 2026
Last update June 9, 2026

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction
Confidentiality
Integrity

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 15, 2026 CVE published
June 9, 2026 Record updated