Specially crafted string can cause a buffer overrun in the JSON parser library leading to a crash of the Zabbix Server or a Zabbix Proxy.
Exploitability
AV:NAC:LPR:HUI:NScope
S:UImpact
C:LI:LA:L4.7/CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:LInput Validation