Vulnerability Description
MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. Language::translateBlockExpiry itself does not escape in all code paths. For example, the return of Language::userTimeAndDate is is always unsafe for HTML in a month value. This affects MediaWiki 1.12.0 and later.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mediawiki | Mediawiki | >= 1.12.0, < 1.35.1 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 33 |
Related Weaknesses (CWE)
References
- https://lists.debian.org/debian-lts-announce/2020/12/msg00034.htmlMailing ListThird 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/T268938ExploitVendor Advisory
- https://www.debian.org/security/2020/dsa-4816Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00034.htmlMailing ListThird 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/T268938ExploitVendor Advisory
- https://www.debian.org/security/2020/dsa-4816Third Party Advisory
FAQ
What is CVE-2020-35479?
CVE-2020-35479 is a vulnerability with a CVSS score of 6.1 (MEDIUM). MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. Language::translateBlockExpiry itself does not escape in all code paths. For example, the return of Language::userTimeAndDate is is always...
How severe is CVE-2020-35479?
CVE-2020-35479 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-2020-35479?
Check the references section above for vendor advisories and patch information. Affected products include: Mediawiki Mediawiki, Debian Debian Linux, Fedoraproject Fedora.