CVE-2021-40940 : What You Need to Know

Monstra 3.0.4 is vulnerable to an unrestricted file upload issue due to a lack of case filtering for PHP files.

Understanding CVE-2021-40940

This CVE entry details a security vulnerability in Monstra 3.0.4 that could allow an attacker to upload malicious PHP files.

What is CVE-2021-40940?

Monstra 3.0.4 lacks proper filtering for the case of PHP files, enabling an attacker to upload and execute malicious PHP scripts.

The Impact of CVE-2021-40940

The vulnerability could lead to unauthorized file uploads, potentially allowing an attacker to take control of the affected system and execute arbitrary code.

Technical Details of CVE-2021-40940

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability in Monstra 3.0.4 arises from the omission of case filtering for PHP file uploads, enabling malicious actors to execute arbitrary PHP code.

Affected Systems and Versions

Product: Monstra 3.0.4
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

Attackers can craft PHP files with various cases to bypass the upload filter.
By exploiting this flaw, threat actors can upload and execute malicious PHP scripts.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Update Monstra to the latest version or apply patches provided by the vendor.
Implement proper input validation and sanitization mechanisms to prevent malicious uploads.

Long-Term Security Practices

Regularly monitor and audit file uploads on the system.
Educate users on secure upload practices and the risks associated with unfiltered file uploads.

Patching and Updates

Stay informed about security updates for Monstra and apply them promptly to mitigate known vulnerabilities.