pfSense: pfSense-SA-22_05.webgui: XSS vulnerability in the WebGUI

A Cross-Site Scripting (XSS) vulnerability was found in firewall_aliases.php, a
component of the pfSense Plus and pfSense CE software GUI.

This problem is present on pfSense Plus version 22.05, pfSense CE version 2.6.0,
and earlier versions of both.

The page did not sanitize the contents of URL Table Alias URL parameters nor did
it encode the output when it included the value of that parameter in the page
when viewing the list of aliases on the URL or All tabs, leading to a possible
XSS.

Due to the lack of proper encoding on the affected parameters susceptible to
XSS, arbitrary JavaScript could be executed in the user's browser. The user's
session cookie or other information from the session may be compromised.