CVE-2020-7292: Web Gateway (MWG) - Inappropriate Encoding for output context

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-15 · updated 2026-06-17
Weakness: CWE-838

Description

Inappropriate Encoding for output context vulnerability in McAfee Web Gateway (MWG) prior to 9.2.1 allows a remote attacker to cause MWG to return an ambiguous redirect response via getting a user to click on a malicious URL.

Affected products

McAfee Web Gateway (MWG): from 7.8.0 before 7.8.2.22; from 8.2.0 before 8.2.9; from 9.0.0 before 9.2.1 — fixed in 7.8.2.22, 8.2.9, 9.2.1

How to fix

Upgrade to a fixed version: McAfee Web Gateway (MWG) 7.8.2.22, 8.2.9, 9.2.1. Check the vendor advisory for mitigations.

References

https://kc.mcafee.com/corporate/index?page=content&id=SB10323
https://kc.mcafee.com/corporate/index?page=content&id=SB10323

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