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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
3.8 LOW
NETWORK
LOW
HIGH
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 44%
VendorProductVersion
get-simplegetsimple_cms
3.3.15
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301
https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301