{"id":"CVE-2018-19421","details":"In GetSimpleCMS 3.3.15, admin/upload.php blocks .html uploads but Internet Explorer render HTML elements in a .eml file, because of admin/upload-uploadify.php, and validate_safe_file in admin/inc/security_functions.php.","modified":"2026-04-10T04:08:47.843574Z","published":"2018-11-21T21:29:00.267Z","references":[{"type":"EVIDENCE","url":"https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/getsimplecms/getsimplecms","events":[{"introduced":"0"},{"last_affected":"a26202bee203910780f5a96b3bc1f52a8f23d0a1"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"3.3.15"}]}}],"versions":["3.3.12","3.3.15","v3.1.1","v3.1.2","v3.2.1","v3.2.2","v3.3.14","v3.3.14b1","v3.3.14b2","v3.3.5"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-19421.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N"}]}