CVE-2020-28693 : Security Advisory and Response

HorizontCMS 1.0.0-beta has an unrestricted file upload vulnerability that allows an authenticated remote attacker to upload PHP code through a zip file.

Understanding CVE-2020-28693

This CVE involves a security issue in HorizontCMS 1.0.0-beta that enables attackers to upload malicious PHP code.

What is CVE-2020-28693?

The vulnerability in HorizontCMS 1.0.0-beta permits authenticated remote attackers to upload PHP code via a zip file by uploading a theme. The attacker can then execute the PHP file through an HTTP GET request to /themes/<php_file_name>.

The Impact of CVE-2020-28693

This vulnerability can lead to unauthorized execution of arbitrary PHP code on the affected system, potentially compromising the integrity and confidentiality of data.

Technical Details of CVE-2020-28693

HorizontCMS 1.0.0-beta's unrestricted file upload vulnerability has the following technical aspects:

Vulnerability Description

The flaw allows authenticated remote attackers to upload PHP code through a zip file by uploading a theme and executing the PHP file via an HTTP GET request.

Affected Systems and Versions

Product: HorizontCMS 1.0.0-beta
Vendor: N/A
Version: N/A

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading a theme containing malicious PHP code in a zip file and then triggering the execution of the PHP file through an HTTP GET request.

Mitigation and Prevention

To address CVE-2020-28693, consider the following mitigation strategies:

Immediate Steps to Take

Disable file uploads in HorizontCMS until a patch is available.
Monitor system logs for any suspicious file uploads.

Long-Term Security Practices

Implement file type validation for uploaded content.
Regularly update and patch HorizontCMS to prevent known vulnerabilities.

Patching and Updates

Apply the latest patches and updates provided by HorizontCMS to fix the unrestricted file upload vulnerability.