CVE-2020-27387 : Vulnerability Insights and Analysis

HorizontCMS through 1.0.0-beta is affected by an unrestricted file upload vulnerability that allows an authenticated remote attacker to upload and execute arbitrary PHP code.

Understanding CVE-2020-27387

This CVE describes a critical security issue in HorizontCMS that enables attackers to upload and run malicious PHP code.

What is CVE-2020-27387?

An unrestricted file upload problem in HorizontCMS through version 1.0.0-beta permits authenticated remote attackers to upload and execute arbitrary PHP code.

The Impact of CVE-2020-27387

The vulnerability allows attackers to upload PHP payloads and execute them through the FileManager, potentially leading to unauthorized access and code execution on the server.

Technical Details of CVE-2020-27387

HorizontCMS through version 1.0.0-beta is susceptible to an unrestricted file upload vulnerability.

Vulnerability Description

The flaw enables authenticated remote attackers to upload and execute PHP code by manipulating file extensions and using the FileManager's rename function.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers with access to the FileManager can upload a PHP payload, rename it with a PHP extension, and execute it via an HTTP GET request to /storage/<php_file_name>.

Mitigation and Prevention

To address CVE-2020-27387, follow these steps:

Immediate Steps to Take

Apply the vendor's patch for HorizontCMS.
Restrict access to the FileManager to authorized users only.
Monitor file uploads and executions for suspicious activities.

Long-Term Security Practices

Regularly update and patch all software components.
Implement file upload restrictions and validation mechanisms.
Conduct security training for users to recognize and report suspicious activities.

Patching and Updates

Ensure that the latest version of HorizontCMS is installed with the vendor's security patch to mitigate the unrestricted file upload vulnerability.