CVE-2025-40902: Nozominetworks Cmc

Medium severity, CVSS 4.8. EPSS: 0.2% chance of exploitation in the next 30 days.

A Stored HTML Injection vulnerability was discovered in the Users functionality due to improper validation of an input parameter. An authenticated user with administrative privileges can create a malicious user whose username contains HTML tags. When a victim attempts to delete a group containing the affected user, 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.

Affected products

• Nozominetworks Cmc: before 26.1.0 (fixed in 26.1.0)
• Nozominetworks Guardian: before 26.1.0 (fixed in 26.1.0)

Published 2026-05-19. Last modified 2026-06-17.