CVE-2020-26121

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.

• CWE-863

• https://commons.wikimedia.org/w/index.php?oldid=454609892#File:Wiki.pngVendor Advisory
• https://gerrit.wikimedia.org/r/q/Ib852a96afc4dca10516d0510e69c10f9892b351bPatch, Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/
• https://phabricator.wikimedia.org/T262628Issue Tracking, Patch, Vendor Advisory
• https://commons.wikimedia.org/w/index.php?oldid=454609892#File:Wiki.pngVendor Advisory
• https://gerrit.wikimedia.org/r/q/Ib852a96afc4dca10516d0510e69c10f9892b351bPatch, Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/
• https://phabricator.wikimedia.org/T262628Issue Tracking, Patch, Vendor Advisory

Published

Sep 27, 2020

Last Modified

Jun 17, 2026

Status

Modified

• Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
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