Vulnerability Details CVE-2018-19421
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 44.8%
CVSS Severity
CVSS v3 Score 3.8
CVSS v2 Score 4.0
References
Products affected by CVE-2018-19421
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cpe:2.3:a:get-simple:getsimple_cms:3.3.15