The oxide::JavaScriptDialogManager function in oxide-qt before 1.9.1 as packaged in Ubuntu 15.04 and Ubuntu 14.04 allows remote attackers to cause a denial of service (application crash) or execute arbitrary code via a crafted website.
https://launchpad.net/ubuntu/+source/oxide-qt/1.9.1-0ubuntu0.15.04.1
http://www.ubuntu.com/usn/USN-2735-1
http://www.securityfocus.com/bid/76710
http://people.canonical.com/~ubuntu-security/cve/2015/CVE-2015-1332.html