Exploit Published for Critical FortiSIEM Command Injection
🔓 A critical FortiSIEM vulnerability, tracked as CVE-2025-25256, enables remote unauthenticated attackers to execute arbitrary commands by invoking exposed phMonitor handlers. Horizon3.ai disclosed technical details and published a demonstrative exploit after Fortinet issued patches across supported branches. The flaw combines arbitrary write with privilege escalation to root and affects a range of FortiSIEM releases; Fortinet advises applying the supplied updates or restricting access to the phMonitor port (7900) as a temporary mitigation.
