{"id":"UBUNTU-CVE-2023-3550","details":"Mediawiki v1.40.0 does not validate namespaces used in XML files. Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator.","modified":"2026-04-27T18:28:30.135244Z","published":"2023-09-25T16:15:00Z","upstream":["CVE-2023-3550"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-3550"},{"type":"REPORT","url":"https://phabricator.wikimedia.org/T341565"},{"type":"REPORT","url":"https://www.mediawiki.org/wiki/MediaWiki/"},{"type":"REPORT","url":"https://fluidattacks.com/advisories/blondie/"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-3550"}],"affected":[{"package":{"name":"mediawiki","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mediawiki@1:1.27.4-3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.27.3-1","1:1.27.4-1","1:1.27.4-2","1:1.27.4-3"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.27.4-3"},{"binary_name":"mediawiki-classes","binary_version":"1:1.27.4-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-3550.json"}},{"package":{"name":"mediawiki","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mediawiki@1:1.31.7-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.31.2-1ubuntu1","1:1.31.5-1","1:1.31.5-1ubuntu1","1:1.31.5-2","1:1.31.5-3","1:1.31.5-3ubuntu1","1:1.31.6-1","1:1.31.7-1"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.31.7-1"},{"binary_name":"mediawiki-classes","binary_version":"1:1.31.7-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-3550.json"}},{"package":{"name":"mediawiki","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mediawiki@1:1.35.6-1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.35.3-1","1:1.35.4-1","1:1.35.5-1","1:1.35.5-1ubuntu1","1:1.35.5-1ubuntu2","1:1.35.5-1ubuntu3","1:1.35.6-1"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.35.6-1"},{"binary_name":"mediawiki-classes","binary_version":"1:1.35.6-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-3550.json"}},{"package":{"name":"mediawiki","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/mediawiki@1:1.39.7-1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.39.4-2","1:1.39.5-1","1:1.39.6-1","1:1.39.7-1"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.39.7-1"},{"binary_name":"mediawiki-classes","binary_version":"1:1.39.7-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-3550.json"}},{"package":{"name":"mediawiki","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/mediawiki@1:1.43.3+dfsg-1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.43.1+dfsg-1","1:1.43.1+dfsg-2","1:1.43.3+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.43.3+dfsg-1"},{"binary_name":"mediawiki-classes","binary_version":"1:1.43.3+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-3550.json"}},{"package":{"name":"mediawiki","ecosystem":"Ubuntu:26.04","purl":"pkg:deb/ubuntu/mediawiki@1:1.43.8+dfsg-2?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.43.3+dfsg-1","1:1.43.5+dfsg-1","1:1.43.6+dfsg-2","1:1.43.8+dfsg-1","1:1.43.8+dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_name":"mediawiki","binary_version":"1:1.43.8+dfsg-2"},{"binary_name":"mediawiki-classes","binary_version":"1:1.43.8+dfsg-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-3550.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}