Bug 1903767 (CVE-2020-25812)

Summary: CVE-2020-25812 mediawiki: XSS using raw HTML
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: 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: mediawiki-1.34.4, mediawiki-1.31.10 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-12-07 17:02:51 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: 1903769    
Bug Blocks: 1903781    

Description Dhananjay Arunesh 2020-12-02 18:28:58 UTC 
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:
https://gerrit.wikimedia.org/g/mediawiki/core/+/ad4a3ba45fb955aa8c0eb3c83809b16b40a498b9/includes/specials/SpecialContributions.php#592
https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html
https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html
Comment 1 Dhananjay Arunesh 2020-12-02 18:29:21 UTC 
Created mediawiki tracking bugs for this issue:

Affects: fedora-all [bug 1903769]
Comment 2 Przemyslaw Roguski 2020-12-07 16:14:24 UTC 
Upstream commit:
https://github.com/wikimedia/mediawiki/commit/358c1ec070d4f989e049550d88b629ab166c6f15
Comment 4 Przemyslaw Roguski 2020-12-07 16:14:30 UTC 
External References:

https://phabricator.wikimedia.org/T255918
Comment 5 Przemyslaw Roguski 2020-12-07 16:52:21 UTC 
Statement:

OpenShift Container Platform (OCP)  delivers the mediawiki package, but the vulnerable code is not bundled, therefore OCP is not affected by this flaw.
Comment 6 Product Security DevOps Team 2020-12-07 17:02:51 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-2020-25812