{"id":"CVE-2021-44223","details":"WordPress before 5.8 lacks support for the Update URI plugin header. This makes it easier for remote attackers to execute arbitrary code via a supply-chain attack against WordPress installations that use any plugin for which the slug satisfies the naming constraints of the WordPress.org Plugin Directory but is not yet present in that directory.","aliases":["BIT-wordpress-2021-44223","BIT-wordpress-multisite-2021-44223"],"modified":"2026-07-08T23:58:18.792755Z","published":"2021-11-25T15:15:09.800Z","references":[{"type":"ADVISORY","url":"https://make.wordpress.org/core/2021/06/29/introducing-update-uri-plugin-header-in-wordpress-5-8/"},{"type":"EVIDENCE","url":"https://vavkamil.cz/2021/11/25/wordpress-plugin-confusion-update-can-get-you-pwned/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wordpress/wordpress","events":[{"introduced":"0"},{"fixed":"50caeb6e61ad0c49d2c7e1d6d5115047a011f590"}],"database_specific":{"cpe":"cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"5.8"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-44223.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/wordpress/wordpress-develop","events":[{"introduced":"0"},{"fixed":"4b54a6c2c9a3be775cc6dda66ed207998b068c8f"}],"database_specific":{"cpe":"cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"5.8"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-44223.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}