CWE
79
Advisory Published
Updated

CVE-2020-35479: XSS

First published: Fri Dec 18 2020(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
debian/mediawiki
1:1.31.16-1+deb10u2
1:1.31.16-1+deb10u6
1:1.35.11-1~deb11u1
1:1.35.13-1~deb11u1
1:1.39.4-1~deb12u1
1:1.39.5-1~deb12u1
1:1.39.5-1
Wikimedia MediaWiki>=1.12.0<1.35.1
Debian=9.0
Debian=10.0
Fedora=33

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Frequently Asked Questions

  • What is the severity of CVE-2020-35479?

    CVE-2020-35479 is considered a medium severity vulnerability due to its potential for cross-site scripting (XSS).

  • How do I fix CVE-2020-35479?

    To mitigate CVE-2020-35479, upgrade MediaWiki to version 1.35.1 or later.

  • Which versions of MediaWiki are affected by CVE-2020-35479?

    CVE-2020-35479 affects MediaWiki versions from 1.12.0 up to, but not including, 1.35.1.

  • What type of vulnerability is CVE-2020-35479?

    CVE-2020-35479 is a cross-site scripting (XSS) vulnerability primarily affecting MediaWiki installations.

  • Can CVE-2020-35479 impact all versions of MediaWiki?

    No, CVE-2020-35479 specifically impacts MediaWiki versions from 1.12.0 onward, excluding version 1.35.1 and above.

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