CVE-2020-25812

MEDIUM

MediaWiki 1.34.0-1.34.3 - Cross-Site Scripting via Special:Contributions NS Filter

Title source: llm

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.

References (4)

Core 4

Core References

Vendor Advisory x_refsource_misc

https://gerrit.wikimedia.org/g/mediawiki/core/+/ad4a3ba45fb955aa8c0eb3c83809b16b40a498b9/includes/specials/SpecialContributions.php#592

Mailing List, Vendor Advisory x_refsource_confirm

https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html

Mailing List, Vendor Advisory x_refsource_misc

https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

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

Scores

CVSS v3 6.1

EPSS 0.0037

EPSS Percentile 59.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE

CWE-79

Status published

Products (3)

fedoraproject/fedora 33

mediawiki/core 1.34.0 - 1.34.3Packagist

mediawiki/mediawiki 1.34.0 - 1.34.4

Published Sep 27, 2020

Tracked Since Feb 18, 2026