CVE-2020-26121
High
Description
An issue was discovered in the FileImporter extension for MediaWiki before 1.34.4. An attacker can import a file even when the target page is protected against "page creation" and the attacker should not be able to create it. This occurs because of a mishandled distinction between an upload restriction and a create restriction. An attacker cannot leverage this to overwrite anything, but can leverage this to force a wiki to have a page with a disallowed title.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Mediawiki
PublishedSep 27, 2020
First seenSep 27, 2020
How to fix
Update
- mediawiki mediawiki1.34.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mediawiki mediawiki | v < 1.34.4 | 1.34.4 |
| fedoraproject fedora | 33 | — |
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