CVE-2023-5812 : Vulnerability Insights and Analysis

This CVE-2023-5812 informational article provides insights into a critical vulnerability affecting the flusity CMS upload.php handleFileUpload function, leading to unrestricted upload.

Understanding CVE-2023-5812

The vulnerability identified as CVE-2023-5812 impacts the handleFileUpload function of the file core/tools/upload.php in flusity CMS. Exploiting the argument uploaded_file allows for unrestricted upload, with the potential for remote execution. This vulnerability has a base severity rating of MEDIUM.

What is CVE-2023-5812?

The vulnerability in flusity CMS allows attackers to manipulate the uploaded_file argument, leading to unrestricted file uploads. The exploit can be launched remotely, posing a significant risk to the security of systems utilizing flusity CMS.

The Impact of CVE-2023-5812

Given the critical nature of this vulnerability, it presents a severe security risk as attackers can exploit the unrestricted upload capability to potentially upload malicious files or compromise the system's integrity.

Technical Details of CVE-2023-5812

The affected component is the handleFileUpload function in the file core/tools/upload.php within the flusity CMS environment. The vulnerability is classified as CWE-434 - Unrestricted Upload.

Vulnerability Description

The exploitation of the argument uploaded_file within the handleFileUpload function allows for unrestricted file uploads, enabling potential malicious activities by threat actors aiming to compromise system security.

Affected Systems and Versions

The vulnerability affects the flusity CMS product, specifically the handleFileUpload function in the file core/tools/upload.php. As the product does not employ versioning, details about affected and unaffected releases are unavailable.

Exploitation Mechanism

Attackers can remotely manipulate the uploaded_file argument to exploit the unrestricted upload vulnerability in the handleFileUpload function of flusity CMS, posing a significant security risk to the system.

Mitigation and Prevention

Mitigating the CVE-2023-5812 vulnerability requires immediate action and ongoing security practices to safeguard systems against potential exploitation.

Immediate Steps to Take

Consider restricting access to the handleFileUpload function to authorized users only.
Implement input validation mechanisms to ensure uploaded files meet specified criteria.

Long-Term Security Practices

Regularly monitor and audit file upload activities to detect any suspicious behavior.
Stay informed about security updates and patches released by the vendor.

Patching and Updates

As information about affected versions is unavailable due to the lack of versioning in flusity CMS, it is crucial to stay vigilant for any security advisories or patches provided by the vendor to address the vulnerability effectively.