{"id":"CVE-2018-19421","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-19421","generatedAt":"2026-10-28T20:25:45.184Z","title":"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.","description":"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.","published":"2018-11-21T21:29:00.000Z","lastModified":"2026-06-17T01:49:17.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":3.8,"severity":"LOW","vector":"CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N"},"cwe":["CWE-434"],"affected":["get-simple/getsimple cms"],"epss":{"score":0.00777,"percentile":0.5561,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.78%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-19421","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}