The terminal_helper_execute function in terminal/terminal.c in Xfce Terminal 0.2.6 allows user-assisted remote attackers to execute arbitrary commands via shell metacharacters in a crafted link, as demonstrated using the "Open Link" functionality.
https://exchange.xforce.ibmcloud.com/vulnerabilities/35379
http://www.ubuntu.com/usn/usn-497-1
http://www.securityfocus.com/bid/24889
http://www.debian.org/security/2007/dsa-1393
http://security.gentoo.org/glsa/glsa-200708-07.xml
http://secunia.com/advisories/27374
http://secunia.com/advisories/26418
http://secunia.com/advisories/26392