Vulnerability Description
In MediaWiki before 1.31.15, 1.32.x through 1.35.x before 1.35.3, and 1.36.x before 1.36.1, bots have certain unintended API access. When a bot account has a "sitewide block" applied, it is able to still "purge" pages through the MediaWiki Action API (which a "sitewide block" should have prevented).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mediawiki | Mediawiki | < 1.31.15 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 33 |
Related Weaknesses (CWE)
References
- https://lists.debian.org/debian-lts-announce/2021/10/msg00003.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.wikimedia.org/hyperkitty/list/mediawiki-announce%40lists.wikimedia
- https://phabricator.wikimedia.org/T280226ExploitVendor Advisory
- https://security.gentoo.org/glsa/202107-40Third Party Advisory
- https://www.debian.org/security/2021/dsa-4979Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00003.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.wikimedia.org/hyperkitty/list/mediawiki-announce%40lists.wikimedia
- https://phabricator.wikimedia.org/T280226ExploitVendor Advisory
- https://security.gentoo.org/glsa/202107-40Third Party Advisory
FAQ
What is CVE-2021-35197?
CVE-2021-35197 is a vulnerability with a CVSS score of 7.5 (HIGH). In MediaWiki before 1.31.15, 1.32.x through 1.35.x before 1.35.3, and 1.36.x before 1.36.1, bots have certain unintended API access. When a bot account has a "sitewide block" applied, it is able to st...
How severe is CVE-2021-35197?
CVE-2021-35197 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-35197?
Check the references section above for vendor advisories and patch information. Affected products include: Mediawiki Mediawiki, Debian Debian Linux, Fedoraproject Fedora.