CVE-2025-40902

What it is

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.

At a glance

Exploitability

Can be exploited over the network with an admin-level account, but needs a user to act. Limited direct impact.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-05-19 14:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-14 13:10 UTC Last updatedMost recent change to the record

Details

Published

2026-05-19 14:16 UTC

Last modified

2026-10-14 13:10 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-79 · Cross-site scripting

Record status

Modified

Affected

• Nozominetworks Cmc < 26.1.0
• Nozominetworks Guardian < 26.1.0

Attack profile CVSS 4.0 · 4.8

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

High

User interaction

Passive

Confidentiality

Low

Integrity

Low

Availability

Low