The Plainview Activity Monitor plugin before 20180826 for WordPress is vulnerable to OS command injection via shell metacharacters in the ip parameter of a wp-admin/admin.php?page=plainview_activity_monitor&tab=activity_tools request.
packetstormsecurity.com/files/155502/WordPress-Plainview-Activity-Monitor-20161228-Remote-Command-Execution.html
packetstormsecurity.com/files/163425/WordPress-Plainview-Activity-Monitor-20161228-Remote-Code-Execution.html
github.com/aas-n/CVE/tree/master/CVE-2018-15877
www.exploit-db.com/exploits/45274/