{"action":"Upgrade mediawiki to 1:1.39.5-1 or later.","affected":[{"fixed":"1:1.39.5-1","introduced":"0"}],"component":"mediawiki","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:1.39.5-1"],"id":"tcs_01M5NJ48715J3M7RCS10S6PFQ8","modified_at":"2026-10-26T18:01:26.499325453Z","published_at":"2023-09-25T16:15:14.347Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2023-3550","https://security-tracker.debian.org/tracker/CVE-2023-3550"],"severity":{"label":"high","score":7.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2023-3550#Debian:14/mediawiki","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2023-3550"}],"summary":"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 ex"}