An improper neutralization of special elements used in an OS Command vulnerability [CWE-78] in Fortinet FortiSandbox version 5.0.0, 4.4.0 through 4.4.7, 4.2.0 through 4.2.7 and before 4.0.5 allows an authenticated attacker with at least read-only permission to execute unauthorized commands via crafted requests.
https://www.securityweek.com/fortinet-patches-18-vulnerabilities/