CVEvulnerability
CVE-2020-26121
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-09-27
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-863
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.
Affected configurations
• mediawiki mediawiki (< 1.34.4)
• fedoraproject fedora 33
Related
Weakness · CWE (1)
- CWE-863 Incorrect Authorization weakness
References
- https://commons.wikimedia.org/w/index.php?oldid=454609892#File:Wiki.png Vendor Advisory
- https://gerrit.wikimedia.org/r/q/Ib852a96afc4dca10516d0510e69c10f9892b351b Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/ lists.fedoraproject.org
- https://phabricator.wikimedia.org/T262628 Issue Tracking, Patch, Vendor Advisory
- https://commons.wikimedia.org/w/index.php?oldid=454609892#File:Wiki.png Vendor Advisory
- https://gerrit.wikimedia.org/r/q/Ib852a96afc4dca10516d0510e69c10f9892b351b Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/ lists.fedoraproject.org
- https://phabricator.wikimedia.org/T262628 Issue Tracking, Patch, Vendor Advisory