CVE-2021-44858 Missing authorization in n/a
Attackers can view private pages on a private MediaWiki instance by exploiting specific edit actions when a read whitelist is configured.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-44858?
CVE-2021-44858 is a high-severity missing authorization vulnerability in Mediawiki Mediawiki, published on 20 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. It is possible to use action=edit&undo= followed by action=mcrundo and action=mcrrestore to view private pages on a private wiki that has at least one page set in $wgWhitelistRead.
Weakness: CWE-276
Which versions are affected by CVE-2021-44858?
1 open source package ship an affected version, including mediawiki. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mediawiki Bitnami | All versions | 1.35.5, 1.36.3, 1.37.1 |
Products include Mediawiki Mediawiki.
How do I fix CVE-2021-44858?
Upgrade mediawiki to a fixed version for your release line: 1.35.5, 1.36.3 or 1.37.1.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-44858 being exploited?
There is no known exploitation of CVE-2021-44858 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as BIT-mediawiki-2021-44858, DEBIAN-CVE-2021-44858, DLA-2847-1, GHSA-7h7h-4rmp-2qm5, UBUNTU-CVE-2021-44858.