osCommerce 2.3.4.1 has an incomplete '.htaccess' for blacklist filtering in the "product" page. The .htaccess file in catalog/images/ bans the html extension, but Internet Explorer render HTML elements in a .eml file.
{ "versions": [ { "introduced": "0" }, { "last_affected": "2.3.4.1" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-18966.json"