CVE-2025-25256 Scanner

Fortinet FortiSIEM is widely used by enterprises to monitor the security of their networks and systems. It is developed and supported by Fortinet, a well-known cybersecurity company. FortiSIEM provides real-time visibility into network and security activities for IT and security operations teams. The software is implemented to assist organizations in comprehending the security status of their systems and to provide a holistic view of network security. FortiSIEM is often deployed in environments where comprehensive cybersecurity monitoring is essential. It integrates various data points to help organizations prevent breaches and maintain compliance with regulatory guidelines.

The OS Command Injection vulnerability in Fortinet FortiSIEM allows attackers to execute arbitrary system commands on the server. This vulnerability arises due to improper neutralization of special elements used in command-line instructions. Attackers leveraging this flaw can achieve unauthorized command execution without authentication, leading to a critical security risk. The impacted versions are susceptible to remote execution attacks where malicious inputs can lead to significant security breaches. Such vulnerabilities are critical as they allow attackers unfettered access, potentially compromising the entire system's integrity. An urgent update beyond version 7.3.1 is necessary to mitigate such risks.

Technical details reveal that the vulnerability allows execution of arbitrary commands due to flaws in handling CLI requests. It affects specific endpoints within the FortiSIEM appliance, which improperly parse user inputs. The vulnerable parameters are part of the administrative interface, which controls system configurations. Attackers can craft special inputs to exploit this endpoint, bypassing security protocols and executing unmanaged commands. The improper input validation within these CLI requests forms the technical base of this vulnerability. It potentially exposes sensitive system management functions to unauthorized actors capable of wreaking system havoc through command injection paths.

Exploiting the OS Command Injection can potentially lead to severe impacts, including full system compromise. Unauthorized access can allow attackers to alter system configurations maliciously. Attackers may inject harmful scripts that can disrupt services or exfiltrate sensitive data, deteriorating the trust and operational integrity of the affected organization's IT infrastructure. Additionally, successful exploitation would enable persistent threats within the network, allowing continued exploitation and unauthorized access over time. Ensuring prompt patching and updates is critical to prevent potential exploitation paths for unauthorized command executions.

REFERENCES

• https://www.fortiguard.com/psirt/FG-IR-25-152
• https://github.com/watchtowrlabs/watchTowr-vs-FortiSIEM-CVE-2025-25256
• https://labs.watchtowr.com/should-security-solutions-be-secure-maybe-were-all-wrong-fortinet-fortisiem-pre-auth-command-injection-cve-2025-25256/