CVE-2020-21653 : Security Advisory and Response

Myucms v2.2.1 contains a server-side request forgery (SSRF) vulnerability that can be exploited via the sj() method.

Understanding CVE-2020-21653

This CVE entry describes a specific vulnerability in Myucms v2.2.1 that allows for server-side request forgery.

What is CVE-2020-21653?

CVE-2020-21653 is a vulnerability found in Myucms v2.2.1, specifically in the component \controller\index.php, enabling SSRF through the sj() method.

The Impact of CVE-2020-21653

This vulnerability could potentially allow an attacker to manipulate server requests, leading to unauthorized access to internal systems or services.

Technical Details of CVE-2020-21653

This section provides more technical insights into the vulnerability.

Vulnerability Description

Myucms v2.2.1 is susceptible to SSRF attacks due to improper handling of user-supplied input in the \controller\index.php component.

Affected Systems and Versions

Affected Version: Myucms v2.2.1

Exploitation Mechanism

The vulnerability can be exploited by utilizing the sj() method to trigger malicious server-side requests.

Mitigation and Prevention

To address CVE-2020-21653, follow these mitigation strategies:

Immediate Steps to Take

Disable or restrict access to the vulnerable component
Implement input validation and sanitization to prevent SSRF attacks

Long-Term Security Practices

Regularly update and patch the Myucms software
Conduct security audits to identify and address vulnerabilities

Patching and Updates

Apply patches or updates provided by the Myucms vendor to fix the SSRF vulnerability