Multiple cross-site scripting (XSS) vulnerabilities in the Snort package before 3.0.13 for pfSense through 2.1.4 allow remote attackers to inject arbitrary web script or HTML via (1) the eng parameter to snort_import_aliases.php or (2) unspecified variables to snort_select_alias.php.

Multiple open redirect vulnerabilities in the Snort package before 3.0.13 for pfSense through 2.1.4 allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via (1) the referer parameter to snort_rules_flowbits.php or (2) the returl parameter to snort_select_alias.php.

The DecodeTCPOptions function in decode.c in Snort before 2.3.0, when printing TCP/IP options using FAST output or verbose mode, allows remote attackers to cause a denial of service (crash) via packets with invalid TCP/IP options, which trigger a null dereference.