This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 18.104.22.16878. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within app.launchURL method. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code under the context of the current process. Was ZDI-CAN-4724.