Arbitrary file upload in GetSimple CMS - CVE-2018-19421

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Main Vulnerability Database Vulnerabilities #VU36392

Arbitrary file upload in GetSimple CMS - CVE-2018-19421

Published: November 21, 2018 / Updated: August 8, 2020


Vulnerability identifier: #VU36392
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-19421
CWE-ID: CWE-434
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: GetSimple CMS
Affected software:
GetSimple CMS

Detailed vulnerability description

The vulnerability allows a remote privileged user to read and manipulate data.

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.


How to mitigate CVE-2018-19421

Install update from vendor's website.

Sources