pfSense HAProxy Package Reflected Cross-Site Scripting Vulnerability

A reflected cross-site scripting vulnerability has been identified in the HAProxy package of pfSense Community Edition. The issue arises in the 'haproxy_stats.php' file, where the 'showsticktablecontent' GET parameter is displayed without proper encoding. This vulnerability can be exploited when the victim is authenticated.

Impact

Exploitation of this vulnerability allows for reflected cross-site scripting, where an attacker can inject malicious scripts that are executed in the context of the user's browser.

Reproduction

To reproduce this vulnerability, send a GET request to 'haproxy_stats.php' with the 'showsticktablecontent' parameter. The value of this parameter will be reflected back in the response without proper HTML encoding, creating an opportunity for cross-site scripting.

Remediation

The vulnerability has been addressed in a new package build that is now available for pfSense Plus 25.07.1, Plus 25.07, CE 2.8.1, and CE 2.8.0.