CVE-2021-39426 Explained : Impact and Mitigation

This article provides insights into CVE-2021-39426, including its impact, technical details, and mitigation strategies.

Understanding CVE-2021-39426

CVE-2021-39426 relates to an issue discovered in Seacms 11.4 that allows attackers to execute arbitrary PHP code.

What is CVE-2021-39426?

This CVE refers to a vulnerability in Seacms 11.4 that enables attackers to run malicious PHP code through a specific parameter.

The Impact of CVE-2021-39426

The vulnerability can lead to unauthorized execution of arbitrary code, posing a significant security risk to affected systems.

Technical Details of CVE-2021-39426

This section delves into the specifics of the vulnerability in Seacms 11.4.

Vulnerability Description

The issue lies in /Upload/admin/admin_notify.php, allowing code execution via the notify1 parameter.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Version: n/a (affected)

Exploitation Mechanism

The vulnerability can be exploited by manipulating the notify1 parameter when the action parameter is set.

Mitigation and Prevention

Learn how to protect your systems against CVE-2021-39426.

Immediate Steps to Take

Disable the affected functionality if not essential
Implement input validation to prevent malicious code execution

Long-Term Security Practices

Regularly update and patch software to address vulnerabilities
Conduct security audits to identify and mitigate risks

Patching and Updates

Ensure prompt installation of security patches from Seacms to remediate the CVE-2021-39426 vulnerability.