CVE-2020-19049 : Exploit Details and Defense Strategies

Cross Site Scripting (XSS) vulnerability in MyBB v1.8.20 allows remote attackers to inject arbitrary web script or HTML via the "Description" field in the "Add New Forum" page.

Understanding CVE-2020-19049

This CVE involves a security issue in MyBB v1.8.20 that enables attackers to execute XSS attacks through a specific input field.

What is CVE-2020-19049?

CVE-2020-19049 is a Cross Site Scripting (XSS) vulnerability in MyBB v1.8.20 that permits malicious actors to insert unauthorized web scripts or HTML code via a particular field in the "Add New Forum" page.

The Impact of CVE-2020-19049

The exploitation of this vulnerability can lead to unauthorized script execution, potentially compromising the security and integrity of the affected system.

Technical Details of CVE-2020-19049

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

Vulnerability Description

The vulnerability allows remote attackers to inject malicious web scripts or HTML code through the "Description" field in the "Add New Forum" page of MyBB v1.8.20.

Affected Systems and Versions

Product: MyBB
Version: 1.8.20

Exploitation Mechanism

Attackers can exploit this vulnerability by performing an authenticated POST HTTP request to '/Upload/admin/index.php?module=forum-management&action=add'.

Mitigation and Prevention

Protecting systems from CVE-2020-19049 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update MyBB to a patched version that addresses the XSS vulnerability.
Implement input validation mechanisms to sanitize user inputs and prevent XSS attacks.

Long-Term Security Practices

Regularly monitor and audit web applications for security vulnerabilities.
Educate users and administrators about the risks of XSS attacks and best security practices.

Patching and Updates

Apply security patches provided by MyBB promptly to mitigate the XSS vulnerability.