A code injection vulnerability exists in Pulse Connect Secure <9.1R8 that allows an attacker to crafted a URI to perform an arbitrary code execution via the admin web interface.
https://www.tenable.com/cyber-exposure/2020-threat-landscape-retrospective
https://www.avira.com/en/blog/a-gafgyt-variant-that-exploits-pulse-secure-cve-2020-8218
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44516