Citrix Unauthorized Remote Code Execution Attacker - CVE-2019-19781

References: https://blog.fox-it.com/2020/07/01/a-second-look-at-cve-2019-19781-citrix-netscaler-adc/

Bypassing:

1 - Deleted / Modified scripts at: /vpn/../vpns/portal/scripts/*
2 - Forward Slash ("/") issues after perl commnad injection (template injection) attack