CVE-2019-16976 Explained : Impact and Mitigation

FusionPBX version 4.5.7 and earlier are vulnerable to cross-site scripting (XSS) due to unsanitized input in the 'query_string' variable.

Understanding CVE-2019-16976

This CVE identifies a security issue in FusionPBX that allows for XSS attacks.

What is CVE-2019-16976?

In FusionPBX version 4.5.7 and prior, the 'query_string' variable from the URL in a specific file is not properly sanitized, leading to XSS vulnerabilities.

The Impact of CVE-2019-16976

The vulnerability allows attackers to inject malicious scripts into web pages viewed by other users, potentially compromising sensitive data or performing unauthorized actions.

Technical Details of CVE-2019-16976

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The 'query_string' variable in FusionPBX is reflected in the HTML code without proper filtering, enabling XSS attacks.

Affected Systems and Versions

FusionPBX version 4.5.7 and earlier

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts through the unsanitized 'query_string' variable, which gets reflected in the HTML code.

Mitigation and Prevention

Protect your systems from CVE-2019-16976 with these mitigation strategies.

Immediate Steps to Take

Update FusionPBX to a patched version that addresses the XSS vulnerability.
Implement input validation and output encoding to prevent XSS attacks.

Long-Term Security Practices

Regularly monitor and audit your web application for security vulnerabilities.
Educate developers on secure coding practices to prevent similar issues in the future.

Patching and Updates

Apply security patches provided by FusionPBX promptly to mitigate the XSS risk.