CVE-2025-40893 MEDIUM

CVE-2025-40893: HTML injection in Asset List in Guardian/CMC before 25.5.0

Vendor Nozomi Networks
Product Guardian
Weakness CWE-79 · XSS
Published December 18, 2025
Last update June 9, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N

What the vulnerability does

01Description

A Stored HTML Injection vulnerability was discovered in the Asset List functionality due to improper validation of network traffic data. An unauthenticated attacker can send specially crafted network packets to inject HTML tags into asset attributes. When a victim views the affected assets in the Asset List (and similar functions), the injected HTML renders in their browser, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration.

Key dates

02Disclosure timeline

December 18, 2025 CVE published
June 9, 2026 Record updated