CVE-2021-4038

4.8 mediumEPSS 0.6%

Medium (4.8) in mcafee network security manager. 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.

Severity

CVSS 3.1

4.8 medium

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 48% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2021-12-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mcafee:network_security_manager

References

https://kc.mcafee.com/corporate/index?page=content&id=SB10375
https://kc.mcafee.com/corporate/index?page=content&id=SB10375

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