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CVE-2018-19420 Details

Description

In GetSimpleCMS 3.3.15, admin/upload.php blocks .html uploads but there are several alternative cases in which HTML can be executed, such as a file with no extension or an unrecognized extension (e.g., the test or test.asdf filename), because of admin/upload-uploadify.php, and validate_safe_file in admin/inc/security_functions.php.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:3.8 LOWVector:CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301	CVE	ExploitThird Party Advisory
https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301	[email protected]	ExploitThird Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-434	Unrestricted Upload of File with Dangerous Type	[email protected]

Affected Products

Product	Versions
get-simple getsimple cms	3.3.15
CPE cpe:2.3:a:get-simple:getsimple_cms:3.3.15:::::::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Dec 28, 2018	Initial Analysis	[email protected]