An unauthenticated remote attacker can inject malicious input into the ModbusServer application because it does not validate the input it fetches from MQTT. This may lead to integrity and availability loss.
Exploitability
AV:NAC:LAT:NPR:NUI:NVulnerable System
VC:NVI:HVA:HSubsequent System
SC:NSI:NSA:N8.8/CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:NOther