{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "3.3.15"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "a26202bee203910780f5a96b3bc1f52a8f23d0a1"
            }
          ],
          "repo": "https://github.com/getsimplecms/getsimplecms",
          "type": "GIT"
        }
      ]
    }
  ],
  "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.",
  "id": "CVE-2018-19421",
  "modified": "2026-03-13T21:58:41.378419935Z",
  "published": "2018-11-21T21:29:00.267Z",
  "references": [
    {
      "type": "EVIDENCE",
      "url": "https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}