Vulnerability Description
In MediaWiki before 1.35.1, the combination of Html::rawElement and Message::text leads to XSS because the definition of MediaWiki:recentchanges-legend-watchlistexpiry can be changed onwiki so that the output is raw HTML.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mediawiki | Mediawiki | < 1.35.1 |
| Fedoraproject | Fedora | 33 |
Related Weaknesses (CWE)
References
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.htMailing ListRelease NotesVendor Advisory
- https://phabricator.wikimedia.org/T268894ExploitThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.htMailing ListRelease NotesVendor Advisory
- https://phabricator.wikimedia.org/T268894ExploitThird Party Advisory
FAQ
What is CVE-2020-35474?
CVE-2020-35474 is a vulnerability with a CVSS score of 6.1 (MEDIUM). In MediaWiki before 1.35.1, the combination of Html::rawElement and Message::text leads to XSS because the definition of MediaWiki:recentchanges-legend-watchlistexpiry can be changed onwiki so that th...
How severe is CVE-2020-35474?
CVE-2020-35474 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-35474?
Check the references section above for vendor advisories and patch information. Affected products include: Mediawiki Mediawiki, Fedoraproject Fedora.