CVE-2019-3638: Web Gateway (MWG) - Reflected Cross Site Scripting vulnerability

Severity: critical (CVSS 9.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-09-12 · updated 2026-06-17
Weakness: CWE-79

Description

Reflected Cross Site Scripting vulnerability in Administrators web console in McAfee Web Gateway (MWG) 7.8.x prior to 7.8.2.13 allows remote attackers to collect sensitive information or execute commands with the MWG administrator's credentials via tricking the administrator to click on a carefully constructed malicious link.

Affected products

McAfee Web Gateway (MWG): from 7.8.2 before 7.8.2.13; from 8.0.0 before 8.2.0 — fixed in 7.8.2.13, 8.2.0

How to fix

Upgrade to a fixed version: McAfee Web Gateway (MWG) 7.8.2.13, 8.2.0. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2019-3638 or the next vulnerability affects your stack