Cross-site Scripting (XSS) Affecting mediawiki package, versions <1:1.35.4-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
1.44% (72nd percentile)

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  • Snyk IDSNYK-ECHOLATEST-MEDIAWIKI-20414314
  • published3 Oct 2026
  • disclosed11 Oct 2021

Introduced: 11 Oct 2021

CVE-2021-41798  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Echo:latest mediawiki to version 1:1.35.4-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mediawiki package and not the mediawiki package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

MediaWiki before 1.36.2 allows XSS. Month related MediaWiki messages are not escaped before being used on the Special:Search results page.

CVSS Base Scores

version 3.1