Cross-site Scripting (XSS) Affecting mediawiki package, versions <1:1.35.7-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
1.08% (64th percentile)

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  • Snyk IDSNYK-ECHOLATEST-MEDIAWIKI-20414333
  • published3 Oct 2026
  • disclosed2 Jul 2022

Introduced: 2 Jul 2022

CVE-2022-34911  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Echo:latest mediawiki to version 1:1.35.7-1 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.

An issue was discovered in MediaWiki before 1.35.7, 1.36.x and 1.37.x before 1.37.3, and 1.38.x before 1.38.1. XSS can occur in configurations that allow a JavaScript payload in a username. After account creation, when it sets the page title to "Welcome" followed by the username, the username is not escaped: SpecialCreateAccount::successfulAction() calls ::showSuccessPage() with a message as second parameter, and OutputPage::setPageTitle() uses text().

CVSS Base Scores

version 3.1