CVE-2020-20391 Explained : Impact and Mitigation

A Cross Site Scripting vulnerability in GetSimpleCMS 3.4.0a allows attackers to execute malicious scripts via specific actions in admin/snippets.php.

Understanding CVE-2020-20391

This CVE involves a security issue in GetSimpleCMS version 3.4.0a that enables Cross Site Scripting attacks through certain functionalities.

What is CVE-2020-20391?

CVE-2020-20391 is a vulnerability in GetSimpleCMS 3.4.0a that permits attackers to inject and execute malicious scripts by exploiting the Add Snippet and Save snippets features in admin/snippets.php.

The Impact of CVE-2020-20391

This vulnerability can lead to unauthorized script execution, potentially compromising user data, session hijacking, and other security risks.

Technical Details of CVE-2020-20391

Get to know the specifics of this security flaw.

Vulnerability Description

The vulnerability in GetSimpleCMS 3.4.0a allows for Cross Site Scripting attacks via the admin/snippets.php functionality, particularly through Add Snippet and Save snippets actions.

Affected Systems and Versions

Affected Version: GetSimpleCMS 3.4.0a
Other versions may also be impacted; users are advised to exercise caution.

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts through the Add Snippet and Save snippets features in admin/snippets.php, potentially leading to script execution in the context of the user's session.

Mitigation and Prevention

Learn how to protect your systems from CVE-2020-20391.

Immediate Steps to Take

Update GetSimpleCMS to a patched version that addresses the Cross Site Scripting vulnerability.
Avoid executing untrusted scripts or code within the CMS.
Regularly monitor and audit snippets for any suspicious content.

Long-Term Security Practices

Implement input validation mechanisms to sanitize user inputs and prevent script injection.
Educate users on safe coding practices and the risks associated with Cross Site Scripting vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by GetSimpleCMS.
Promptly apply patches to mitigate known vulnerabilities and enhance system security.