Multiple unspecified vulnerabilities in the G/PGP (GPG) Plugin before 2.1 for Squirrelmail might allow "local authenticated users" to inject certain commands via unspecified vectors. NOTE: this might overlap CVE-2005-1924, CVE-2006-4169, or CVE-2007-3634.
http://www.squirrelmail.org/plugin_view.php?id=153
http://www.attrition.org/pipermail/vim/2007-July/001703.html