Argument injection vulnerability in the URI handler in KVIrc 3.4.2 Shiny allows remote attackers to execute arbitrary commands via a " (quote) followed by command line switches in a (1) irc:///, (2) irc6:///, (3) ircs:///, or (4) and ircs6:/// URI. NOTE: this might be due to an incomplete fix for CVE-2007-2951.
https://www.exploit-db.com/exploits/7181
https://exchange.xforce.ibmcloud.com/vulnerabilities/46779
http://www.securityfocus.com/archive/1/498557/100/0/threaded