Xdg-utils 1.0.2 and earlier allows user-assisted remote attackers to execute arbitrary commands via shell metacharacters in a URL argument to (1) xdg-open or (2) xdg-email.
https://bugzilla.redhat.com/show_bug.cgi?id=429513
http://www.vupen.com/english/advisories/2008/0342
http://www.securitytracker.com/id?1019284
http://www.securityfocus.com/bid/27528
http://www.mandriva.com/security/advisories?name=MDVSA-2008:031
http://security.gentoo.org/glsa/glsa-200801-21.xml
http://secunia.com/advisories/29048
http://secunia.com/advisories/28728
http://secunia.com/advisories/28638
http://lists.opensuse.org/opensuse-security-announce/2008-02/msg00008.html