The bashMail function in cms/data/skins/techjunkie/fragments/contacts/functions.php in SkyBlueCanvas CMS before 1.1 r248-04, when the pid parameter is 4, allows remote attackers to execute arbitrary commands via shell metacharacters in the (1) name, (2) email, (3) subject, or (4) message parameter to index.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/90670
http://www.securityfocus.com/bid/65129
http://www.exploit-db.com/exploits/31432
http://www.exploit-db.com/exploits/31183
http://secunia.com/advisories/56646
http://seclists.org/fulldisclosure/2014/Jan/159
http://packetstormsecurity.com/files/124948/SkyBlueCanvas-CMS-1.1-r248-03-Command-Injection.html