CVE-2020-19551 Explained : Impact and Mitigation

A blacklist bypass issue in WUZHI CMS up to version 4.1.0 can lead to remote code execution.

Understanding CVE-2020-19551

This CVE involves a vulnerability in WUZHI CMS that allows for a blacklist bypass, potentially resulting in remote code execution.

What is CVE-2020-19551?

The CVE-2020-19551 vulnerability is a security issue in WUZHI CMS versions up to and including 4.1.0, specifically in the common.func.php file. Exploiting this vulnerability can enable an attacker to execute remote code on the affected system.

The Impact of CVE-2020-19551

The impact of this vulnerability is severe as it allows attackers to bypass security measures and execute malicious code remotely, potentially leading to unauthorized access and control of the system.

Technical Details of CVE-2020-19551

This section provides more technical insights into the CVE-2020-19551 vulnerability.

Vulnerability Description

The vulnerability exists in the common.func.php file of WUZHI CMS up to version 4.1.0, enabling a blacklist bypass that can be exploited for remote code execution.

Affected Systems and Versions

Affected system: WUZHI CMS
Affected versions: Up to and including 4.1.0

Exploitation Mechanism

The vulnerability can be exploited by uploading a specially crafted file to the system, bypassing the blacklist mechanism and executing malicious code remotely.

Mitigation and Prevention

Protecting systems from CVE-2020-19551 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update WUZHI CMS to the latest version that includes a patch for CVE-2020-19551.
Implement strict file upload controls and validation mechanisms.
Monitor system logs for any suspicious activities.

Long-Term Security Practices

Regularly audit and review the security configurations of WUZHI CMS.
Conduct security training for users to raise awareness of potential threats.
Stay informed about security updates and vulnerabilities related to WUZHI CMS.

Patching and Updates

Ensure timely application of security patches released by WUZHI CMS to address CVE-2020-19551 and other known vulnerabilities.