CVE-2020-25812

Medium

Description

An issue was discovered in MediaWiki 1.34.x before 1.34.4. On Special:Contributions, the NS filter uses unescaped messages as keys in the option key for an HTMLForm specifier. This is vulnerable to a mild XSS if one of those messages is changed to include raw HTML.

SeverityMedium

CVSS6.1

Exploit probability—

Product

Mediawiki

PublishedSep 27, 2020

First seenSep 27, 2020

How to fix

Update

mediawiki mediawiki1.34.4 or later
mediawiki/core1.34.3, 1.35.0 or later

Vendor advisories

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/

Affected products

Product	Affected versions	Fixed in
mediawiki mediawiki	1.34.0 ≤ v < 1.34.4	1.34.4
fedoraproject fedora	33	—
mediawiki/corePackagist	1.34.0 ≤ v < 1.34.3, 1.35.0-rc.0 ≤ v < 1.35.0	1.34.3, 1.35.0

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