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.
01
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-26121US | high7.5OT elevated | — | ||
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… | ||||
02
references
External citations — patches, advisories, analysis.
- https://commons.wikimedia.org/w/index.php?oldid=454609892#File:Wiki.pngWEB
- https://gerrit.wikimedia.org/r/q/Ib852a96afc4dca10516d0510e69c10f9892b351bWEB
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/WEB
- https://nvd.nist.gov/vuln/detail/CVE-2020-26121WEB
- https://phabricator.wikimedia.org/T262628WEB
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