CVE-2019-16972 : Vulnerability Insights and Analysis

FusionPBX up to version 4.5.7 is vulnerable to XSS attacks due to improper sanitization of the 'id' variable in the URL.

Understanding CVE-2019-16972

This CVE involves a security vulnerability in FusionPBX that could allow for cross-site scripting attacks.

What is CVE-2019-16972?

The file app\contacts\contact_addresses.php in FusionPBX versions up to 4.5.7 is susceptible to XSS attacks as the 'id' variable from the URL is not sanitized, leading to unsanitized input being reflected in the HTML output.

The Impact of CVE-2019-16972

The vulnerability in FusionPBX could be exploited by attackers to execute malicious scripts in the context of a user's browser, potentially compromising sensitive data or performing unauthorized actions.

Technical Details of CVE-2019-16972

This section provides more technical insights into the CVE.

Vulnerability Description

The 'id' variable in the URL of FusionPBX is not properly sanitized, allowing for XSS attacks where unsanitized input is reflected in the HTML output.

Affected Systems and Versions

Affected System: FusionPBX
Affected Versions: Up to 4.5.7

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts through the unsanitized 'id' variable in the URL, which are then executed in the context of the user's browser.

Mitigation and Prevention

Protecting systems from CVE-2019-16972 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update FusionPBX to the latest version that includes a patch for this vulnerability.
Implement input validation and sanitization mechanisms to prevent XSS attacks.

Long-Term Security Practices

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

Patching and Updates

Ensure that FusionPBX is regularly updated with the latest security patches to mitigate the risk of XSS attacks.