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Cross-site Scripting (XSS) Affecting mediawiki package, versions <1:1.31.12-1~deb10u1

0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Scope Changed

    Threat Intelligence

    EPSS 0.21% (59th percentile)
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NVD
6.1 medium
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Red Hat
6.1 medium

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  • Snyk ID SNYK-DEBIAN10-MEDIAWIKI-1052813
  • published 18 Dec 2020
  • disclosed 18 Dec 2020
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Introduced: 18 Dec 2020

CVE-2020-35479 Open this link in a new tab
CWE-79 Open this link in a new tab

How to fix?

Upgrade Debian:10 mediawiki to version 1:1.31.12-1~deb10u1 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 Debian. See How to fix? for Debian:10 relevant fixed versions and status.

MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. Language::translateBlockExpiry itself does not escape in all code paths. For example, the return of Language::userTimeAndDate is is always unsafe for HTML in a month value. This affects MediaWiki 1.12.0 and later.