CVE-2018-19420 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Reference

https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1301

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

3.8