CVE-2025-40890 MEDIUM

CVE-2025-40890: Stored Cross-Site Scripting (XSS) in Dashboards in Guardian/CMC before 25.4.0

Vendor Nozomi Networks
Product Guardian
Weakness CWE-79 · XSS
Published November 25, 2025
Last update November 26, 2025

CVSS base score

5.8/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/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 Dashboards functionality due to improper validation of an input parameter. An authenticated low-privilege user can craft a malicious dashboard containing a JavaScript payload and share it with victim users, or a victim can be socially engineered to import a malicious dashboard template. When the victim views or imports the dashboard, 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

November 25, 2025 CVE published
November 26, 2025 Record updated