Name: CVE-2020-35479: Improper Neutralization of Input During Web Page Generation
Creator: Rapid7
Published: 2020-12-18T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2020-35479, CWE-79, CVSS 6.1, EPSS 0.01486

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.

CVSS Details

CVSS 3.1 Base Score: 6.1
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Arch Linux	—	Upgrade to the latest version of Arch Linux	Jul 11, 2025	Dec 18, 2020
Debian	—	Upgrade mediawiki	Dec 21, 2020	Dec 18, 2020
Mediawiki	—	Upgrade MediaWiki to the latest version	Dec 21, 2020	Dec 18, 2020

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CVSS Details

Covered by Rapid7

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