CVE-2020-11457 : Vulnerability Insights and Analysis

pfSense before 2.4.5 has a stored XSS vulnerability in system_usermanager_addprivs.php in the WebGUI via the descr parameter.

Understanding CVE-2020-11457

This CVE involves a cross-site scripting (XSS) vulnerability in pfSense.

What is CVE-2020-11457?

pfSense before version 2.4.5 is susceptible to stored XSS in the WebGUI through the descr parameter of a user's full name.

The Impact of CVE-2020-11457

Attackers can exploit this vulnerability to execute malicious scripts in the context of a user's session, potentially leading to unauthorized actions.

Technical Details of CVE-2020-11457

This section provides more technical insights into the vulnerability.

Vulnerability Description

pfSense before 2.4.5 is affected by stored XSS in system_usermanager_addprivs.php in the WebGUI via the descr parameter.

Affected Systems and Versions

Product: pfSense
Vendor: N/A
Versions affected: N/A

Exploitation Mechanism

The vulnerability occurs when an attacker injects malicious scripts into the descr parameter of a user's full name in the WebGUI.

Mitigation and Prevention

Protect your systems from CVE-2020-11457 with these mitigation strategies.

Immediate Steps to Take

Update pfSense to version 2.4.5 or later to patch the vulnerability.
Regularly monitor for any unauthorized changes or activities on the system.

Long-Term Security Practices

Educate users on safe browsing habits and the risks of clicking on unknown links.
Implement strict input validation to prevent XSS attacks.
Consider using web application firewalls to filter and block malicious traffic.

Patching and Updates

Apply security patches and updates promptly to ensure your system is protected against known vulnerabilities.