CVE-2021-28428 Information

Description

File upload vulnerability in HorizontCMS before 1.0.0-beta.3 via uploading a .htaccess and .hello files using the Media Files upload functionality. The original file upload vulnerability (CVE-2020-27387) was remediated by restricting the PHP extensions; however we confirmed that the filter was bypassed via uploading an arbitrary .htaccess and .hello files in order to execute PHP code to gain RCE.

CVSS Vector

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

Reference

https://github.com/ttimot24/HorizontCMS https://github.com/ttimot24/HorizontCMS/commit/9c4d6827cbe96decec6834d53660e14ab2bf8838

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8