CVE-2019-19552 : Vulnerability Insights and Analysis

Sangoma FreePBX versions 13.0.76.43 to 15.0.20 contain a cross-site scripting (XSS) vulnerability in the user management screen of the Administrator website. Attackers with specific privileges can inject malicious code into a user's Display Name, leading to XSS execution.

Understanding CVE-2019-19552

This CVE involves a security issue in Sangoma FreePBX versions 13.0.76.43 to 15.0.20 that allows for XSS attacks through the user management screen.

What is CVE-2019-19552?

CVE-2019-19552 is a cross-site scripting vulnerability present in Sangoma FreePBX versions 13.0.76.43 to 15.0.20, enabling attackers to execute malicious scripts in the context of a targeted user's account.

The Impact of CVE-2019-19552

The vulnerability allows attackers to manipulate user Display Names to insert harmful XSS code, which can then be executed when viewed by other users, potentially leading to account compromise or data theft.

Technical Details of CVE-2019-19552

Sangoma FreePBX versions 13.0.76.43 to 15.0.20 are affected by this XSS vulnerability.

Vulnerability Description

The XSS flaw resides in the user management screen of the Administrator website, accessible via the /admin/config.php?display=userman URI, allowing attackers to insert and execute malicious scripts.

Affected Systems and Versions

Sangoma FreePBX versions 13.0.76.43 to 15.0.20

Exploitation Mechanism

Attackers with the necessary privileges can modify a user's Display Name to include malicious XSS code.
When another user, like an administrator, accesses the User Management screen, the injected XSS payload runs within the victim user's account context.

Mitigation and Prevention

To address CVE-2019-19552, follow these steps:

Immediate Steps to Take

Update Sangoma FreePBX to a patched version that addresses the XSS vulnerability.
Regularly monitor user accounts for any unauthorized changes.

Long-Term Security Practices

Educate users on identifying and avoiding phishing attempts to prevent unauthorized access.
Implement strict user privilege management to limit the impact of potential XSS attacks.

Patching and Updates

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