CVE-2018-19146 Explained : Impact and Mitigation

Concrete5 8.4.3 has a cross-site scripting (XSS) vulnerability that allows administrators to upload SVG files containing HTML data with a SCRIPT element.

Understanding CVE-2018-19146

Concrete5 8.4.3 XSS Vulnerability

What is CVE-2018-19146?

The presence of cross-site scripting (XSS) in Concrete5 8.4.3 arises from a vulnerability in the configuration file named "config/concrete.php." This vulnerability allows administrators to upload SVG files which potentially carry HTML data that includes a SCRIPT element.

The Impact of CVE-2018-19146

Attackers can execute malicious scripts in the context of an authenticated administrator, leading to potential data theft or unauthorized actions.
This vulnerability can compromise the integrity and confidentiality of the affected system.

Technical Details of CVE-2018-19146

Concrete5 8.4.3 XSS Vulnerability Details

Vulnerability Description

Concrete5 8.4.3 is vulnerable to XSS due to the ability of administrators to upload SVG files containing HTML data with a SCRIPT element.

Affected Systems and Versions

Product: Concrete5 8.4.3
Vendor: N/A
Version: N/A

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading SVG files containing malicious scripts, which are executed when accessed by other users.

Mitigation and Prevention

Protecting Against CVE-2018-19146

Immediate Steps to Take

Disable SVG file uploads in Concrete5 to prevent the execution of malicious scripts.
Regularly monitor and audit uploaded files for any suspicious content.

Long-Term Security Practices

Educate administrators on secure file upload practices and the risks associated with allowing SVG uploads.
Implement content security policies (CSP) to restrict the execution of scripts from unauthorized sources.

Patching and Updates

Apply patches or updates provided by Concrete5 to address the XSS vulnerability and enhance system security.