CVE-2019-16968 : Security Advisory and Response

FusionPBX version 4.5.7 and below contain a cross-site scripting (XSS) vulnerability due to unsanitized user input. This can lead to malicious code execution on affected systems.

Understanding CVE-2019-16968

This CVE identifies a security issue in FusionPBX versions 4.5.7 and earlier, allowing potential XSS attacks.

What is CVE-2019-16968?

An unfiltered ID variable from the URL is displayed in HTML in two instances in the file 'app\conference_controls\conference_control_details.php,' creating an XSS vulnerability.

The Impact of CVE-2019-16968

The vulnerability could be exploited by attackers to inject malicious scripts into web pages viewed by users, leading to unauthorized access, data theft, and other security risks.

Technical Details of CVE-2019-16968

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

Vulnerability Description

The issue arises from the use of an unsanitized ID variable from the URL, which is directly reflected in HTML, enabling XSS attacks.

Affected Systems and Versions

FusionPBX versions 4.5.7 and below are affected by this vulnerability.

Exploitation Mechanism

Attackers can craft URLs containing malicious scripts that, when executed, can manipulate the affected HTML elements and compromise the security of the system.

Mitigation and Prevention

Protecting systems from CVE-2019-16968 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update FusionPBX to the latest version to patch the vulnerability.
Implement input validation and output encoding to prevent XSS attacks.

Long-Term Security Practices

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

Patching and Updates

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