Multiple cross-site scripting (XSS) vulnerabilities in pfSense before 2.2.3 allow remote attackers to inject arbitrary web script or HTML via the (1) proxypass parameter to system_advanced_misc.php; (2) adaptiveend, (3) adaptivestart, (4) maximumstates, (5) maximumtableentries, or (6) aliasesresolveinterval parameter to system_advanced_firewall.php; (7) proxyurl, (8) proxyuser, or (9) proxyport parameter to system_advanced_misc.php; or (10) name, (11) notification_name, (12) ipaddress, (13) password, (14) smtpipaddress, (15) smtpport, (16) smtpfromaddress, (17) smtpnotifyemailaddress, (18) smtpusername, or (19) smtppassword parameter to system_advanced_notifications.php.