CVE-2020-26048 : Security Advisory and Response

CuppaCMS before 2019-11-12 allows an authenticated attacker to upload a malicious file within an image extension, enabling remote arbitrary code execution.

Understanding CVE-2020-26048

The vulnerability in CuppaCMS allows an attacker to manipulate file extensions to execute arbitrary code remotely.

What is CVE-2020-26048?

The file manager option in CuppaCMS before 2019-11-12 permits an authenticated attacker to upload a malicious file within an image extension. By using a custom request with the rename function, the attacker can change the image extension to PHP, leading to remote arbitrary code execution.

The Impact of CVE-2020-26048

This vulnerability allows attackers to execute arbitrary code remotely, potentially leading to unauthorized access, data theft, and system compromise.

Technical Details of CVE-2020-26048

The technical aspects of the vulnerability in CuppaCMS.

Vulnerability Description

The flaw in CuppaCMS enables an attacker to upload a file with an image extension and convert it to PHP, facilitating remote code execution.

Affected Systems and Versions

CuppaCMS versions before 2019-11-12 are affected.

Exploitation Mechanism

Attacker uploads a malicious file within an image extension in CuppaCMS.
Utilizes a custom request with the rename function to change the extension to PHP.
Results in remote arbitrary code execution.

Mitigation and Prevention

Protecting systems from CVE-2020-26048.

Immediate Steps to Take

Update CuppaCMS to the latest version to patch the vulnerability.
Implement strict file upload validation to prevent malicious file uploads.

Long-Term Security Practices

Regularly audit and monitor file uploads and extensions in the system.
Train users on secure file handling practices to prevent similar attacks.

Patching and Updates

Apply security patches promptly to mitigate known vulnerabilities like CVE-2020-26048.