CVE-2025-40902 – HTML injection in Users in Guardian/CMC before 26.1.0

CVE ID :CVE-2025-40902

Published : May 19, 2026, 1:21 p.m. | 37 minutes ago

Description :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.

Severity: 5.9 | MEDIUM

Visit the link for more details, such as CVSS details, affected products, timeline, and more…