{"id":"CVE-2023-3550","details":"Mediawiki v1.40.0 does not validate namespaces used in XML files.\n\nTherefore, if the instance administrator allows XML file uploads,\n\na remote attacker with a low-privileged user account can use this\n\nexploit to become an administrator by sending a malicious link to\n\nthe instance administrator.","aliases":["BIT-mediawiki-2023-3550"],"modified":"2026-04-16T04:43:42.065007220Z","published":"2023-09-25T16:15:14.347Z","references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/"},{"type":"WEB","url":"https://www.mediawiki.org/wiki/MediaWiki/"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html"},{"type":"ADVISORY","url":"https://www.debian.org/security/2023/dsa-5520"},{"type":"EVIDENCE","url":"https://fluidattacks.com/advisories/blondie/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wikimedia/mediawiki","events":[{"introduced":"0"},{"last_affected":"468dd69d6ee8e84b9ab26d0ee3d52f215faaf0d4"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.40.0-NA"}]}}],"versions":["1.1.0","1.3.0beta1","1.40.0","1.40.0-rc.0","1.5.0alpha1","1.5.0alpha2","1.5.0beta1","1.5.0beta2","1.5.0beta3","1.5.0beta4","1.6.0"],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"10.0"}]},{"events":[{"introduced":"0"},{"last_affected":"11.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/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"}]}