CVE-2017-16798 Information

Description

In CMS Made Simple 2.2.3.1 the is_file_acceptable function in modules/FileManager/action.upload.php only blocks file extensions that begin or end with a \php\ substring which allows remote attackers to bypass intended access restrictions or trigger XSS via other extensions as demonstrated by .phtml .pht .html or .svg.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Reference

https://github.com/bsmali4/cve/blob/master/CMS20Made20Simple20UPLOAD20FILE20XSS.md

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

5.4