CVE-2021-45472

MEDIUM

MediaWiki <= 1.37 - Cross-Site Scripting via Wikibase External Identifier URL Format

Title source: llm

Description

In MediaWiki through 1.37, XSS can occur in Wikibase because an external identifier property can have a URL format that includes a $1 formatter substitution marker, and the javascript: URL scheme (among others) can be used.

References (3)

Core 3

Core References

Third Party Advisory x_refsource_misc

https://phabricator.wikimedia.org/T297570

Third Party Advisory x_refsource_misc

https://gerrit.wikimedia.org/r/q/I37ece1dfdc80d38055067c9c4fa73ba591acd8bd

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7JNQA53K675TQBBJPZRAG5ZT6XES3IS/

Scores

CVSS v3 6.1

EPSS 0.0026

EPSS Percentile 49.0%

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 (2)

fedoraproject/fedora 35

mediawiki/mediawiki < 1.37

Published Dec 24, 2021

Tracked Since Feb 18, 2026