Bug 2036082 (CVE-2021-45472)

Summary:	CVE-2021-45472 mediawiki: XSS in Wikibase using formatter URL
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aos-bugs, Axel.Thimm, bmontgom, eparis, jburrell, jokerman, mike, nstielau, puiterwijk, shurley, sponnaga
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in mediawiki in versions through 1.37. A cross-site scripting attack (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.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-01-07 17:10:22 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2036083
Bug Blocks:	2036091

Description Guilherme de Almeida Suckevicz 2021-12-29 17:00:21 UTC

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.

Reference:
https://phabricator.wikimedia.org/T297570

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

Comment 1 Guilherme de Almeida Suckevicz 2021-12-29 17:00:34 UTC

Created mediawiki tracking bugs for this issue:

Affects: fedora-all [bug 2036083]

Comment 2 Product Security DevOps Team 2022-01-07 17:10:20 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-45472