Rapid7 Vulnerability & Exploit Database

MediaWiki: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (CVE-2020-25828)

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MediaWiki: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (CVE-2020-25828)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
09/27/2020
Created
10/09/2020
Added
10/08/2020
Modified
12/15/2020

Description

An issue was discovered in MediaWiki before 1.31.10 and 1.32.x through 1.34.x before 1.34.4. The non-jqueryMsg version of mw.message().parse() doesn't escape HTML. This affects both message contents (which are generally safe) and the parameters (which can be based on user input). (When jqueryMsg is loaded, it correctly accepts only whitelisted tags in message contents, and escapes all parameters. Situations with an unloaded jqueryMsg are rare in practice, but can for example occur for Special:SpecialPages on a wiki with no extensions installed.)

Solution(s)

  • mediawiki-upgrade-1_34_4

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