CVE-2021-4038: McAfee Network Security Manager

Medium severity, CVSS 4.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Cross Site Scripting (XSS) vulnerability in McAfee Network Security Manager (NSM) prior to 10.1 Minor 7 allows a remote authenticated administrator to embed a XSS in the administrator interface via specially crafted custom rules containing HTML. NSM did not correctly sanitize custom rule content in all scenarios.

Affected products

• McAfee Network Security Manager: before 10.1.7.48 (fixed in 10.1.7.48)

Published 2021-12-09. Last modified 2026-06-17.