{"id":"CVE-2023-3550","summary":"Stored XSS leads to privilege escalation in MediaWiki v1.40.0","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":"2026-08-12T03:30:18.841942281Z","published":"2023-09-25T15:20:27.351Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"1.40.0"},{"last_affected":"1.40.0"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"Fluid Attacks","cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3550.json"},"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html"},{"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://fluidattacks.com/advisories/blondie/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3550.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-3550"},{"type":"ADVISORY","url":"https://www.debian.org/security/2023/dsa-5520"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wikimedia/mediawiki","events":[{"introduced":"468dd69d6ee8e84b9ab26d0ee3d52f215faaf0d4"},{"last_affected":"468dd69d6ee8e84b9ab26d0ee3d52f215faaf0d4"}],"database_specific":{"cpe":"cpe:2.3:a:mediawiki:mediawiki:1.40.0:-:*:*:*:*:*:*","extracted_events":[{"introduced":"1.40.0-NA"},{"last_affected":"1.40.0-NA"}],"source":"CPE_STRING"}}],"versions":["1.40.0-NA","1.40.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-3550.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"}]}