CVE-2025-25251
📋 TL;DR
A local privilege escalation vulnerability in FortiClient for macOS allows attackers with local access to gain elevated privileges by sending specially crafted XPC messages. This affects FortiClient Mac versions 7.4.0-7.4.2, 7.2.0-7.2.8, and 7.0.0-7.0.14. The vulnerability stems from incorrect authorization checks in the XPC communication mechanism.
💻 Affected Systems
- FortiClient for macOS
📦 What is this software?
Forticlient by Fortinet
Forticlient by Fortinet
⚠️ Risk & Real-World Impact
Worst Case
An attacker with local access could gain root privileges, enabling complete system compromise, data theft, persistence mechanisms, and lateral movement within the network.
Likely Case
Local users or malware with initial foothold could escalate privileges to install additional malware, bypass security controls, or access protected system resources.
If Mitigated
With proper endpoint protection and least privilege principles, impact is limited to isolated systems with minimal lateral movement potential.
🎯 Exploit Status
Exploitation requires local access but appears straightforward based on the vulnerability description. No public exploit code has been reported as of the advisory date.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions 7.4.3, 7.2.9, and 7.0.15 or later
Vendor Advisory: https://fortiguard.fortinet.com/psirt/FG-IR-25-016
Restart Required: Yes
Instructions:
1. Download the latest FortiClient version from the official Fortinet portal. 2. Uninstall the current vulnerable version. 3. Install the patched version (7.4.3, 7.2.9, or 7.0.15+). 4. Restart the system to ensure all components are updated.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and remote local access to affected systems through strict access controls and user privilege management.
Disable unnecessary XPC services
macOSIf FortiClient functionality can be temporarily reduced, consider disabling non-essential XPC services through configuration.
🧯 If You Can't Patch
- Implement strict least privilege principles and monitor for privilege escalation attempts.
- Isolate affected systems from critical network segments and implement enhanced endpoint monitoring.
🔍 How to Verify
Check if Vulnerable:
Check FortiClient version via 'About FortiClient' in the application or by examining the installed application version in macOS Applications folder.Check Version:
Open FortiClient → Click 'FortiClient' menu → Select 'About FortiClient'Verify Fix Applied:
Verify the installed version is 7.4.3, 7.2.9, 7.0.15 or later through the application interface or system information.📡 Detection & Monitoring
Log Indicators:
- Unusual XPC communication patterns from FortiClient processes
- Privilege escalation attempts in system logs
- Unexpected process launches with elevated privileges
Network Indicators:
- Localhost XPC communication anomalies
- Unexpected outbound connections following local privilege escalation
SIEM Query:
Process creation events where parent process is FortiClient-related and child process has elevated privileges (sudo, root execution)