CVE-2019-16981 Explained : Impact and Mitigation

FusionPBX up to v4.5.7 is vulnerable to XSS due to improper sanitization of the 'id' variable in the file conference_profile_params.php.

Understanding CVE-2019-16981

This CVE identifies a cross-site scripting (XSS) vulnerability in FusionPBX versions up to v4.5.7.

What is CVE-2019-16981?

The 'id' variable from the URL in conference_profile_params.php is not properly sanitized, leading to XSS vulnerabilities in FusionPBX.

The Impact of CVE-2019-16981

The unfiltered 'id' variable in the HTML code allows attackers to execute malicious scripts, potentially compromising user data and system integrity.

Technical Details of CVE-2019-16981

FusionPBX's vulnerability to XSS due to unsanitized user input.

Vulnerability Description

The 'id' variable from the URL is reflected in HTML without proper filtering, enabling XSS attacks.

Affected Systems and Versions

FusionPBX versions up to v4.5.7

Exploitation Mechanism

Attackers can inject malicious scripts through the 'id' variable in the URL, exploiting the XSS vulnerability.

Mitigation and Prevention

Steps to address and prevent the XSS vulnerability in FusionPBX.

Immediate Steps to Take

Apply the patch provided by FusionPBX to fix the sanitization issue.
Educate users to avoid clicking on suspicious links that may contain malicious scripts.

Long-Term Security Practices

Regularly update FusionPBX to the latest version to ensure security patches are in place.
Implement input validation and output encoding to prevent XSS vulnerabilities.

Patching and Updates

Update FusionPBX to version 4.5.8 or later to mitigate the XSS vulnerability.