CVE-2025-31365
📋 TL;DR
This CVE describes a code injection vulnerability in FortiClientMac that allows unauthenticated attackers to execute arbitrary code by tricking users into visiting malicious websites. It affects FortiClientMac versions 7.4.0-7.4.3 and 7.2.1-7.2.8. The vulnerability requires user interaction but can lead to full system compromise.
💻 Affected Systems
- FortiClientMac
📦 What is this software?
Forticlient by Fortinet
Forticlient by Fortinet
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the macOS host, installing persistent malware, stealing credentials, and pivoting to other systems.
Likely Case
Attacker executes limited code in user context, potentially stealing local files, browser data, or installing cryptocurrency miners.
If Mitigated
With proper web filtering and user awareness, exploitation attempts are blocked or detected before successful code execution.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious website) but no authentication. The attacker needs to craft a malicious website that triggers the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 7.4.3 and 7.2.8
Vendor Advisory: https://fortiguard.fortinet.com/psirt/FG-IR-25-037
Restart Required: No
Instructions:
1. Open FortiClientMac application. 2. Navigate to Settings > About. 3. Check for updates. 4. If update available, click 'Update Now'. 5. Follow on-screen instructions to complete installation.
🔧 Temporary Workarounds
Web Filtering
allImplement web filtering to block access to known malicious websites and suspicious domains.
User Awareness Training
allEducate users about phishing risks and safe browsing practices to reduce likelihood of visiting malicious sites.
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable systems from critical assets
- Deploy endpoint detection and response (EDR) solutions to detect and block exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check FortiClientMac version in application settings. If version is 7.4.0-7.4.3 or 7.2.1-7.2.8, system is vulnerable.Check Version:
Open FortiClientMac > Settings > About, or run: /Applications/FortiClient.app/Contents/MacOS/FortiClient --versionVerify Fix Applied:
Verify FortiClientMac version is updated to a version beyond the affected ranges (e.g., 7.4.4+ or 7.2.9+).📡 Detection & Monitoring
Log Indicators:
- Unusual process execution from FortiClient components
- Network connections to suspicious domains initiated by FortiClient
Network Indicators:
- Outbound connections to known malicious IPs/domains after FortiClient process activity
SIEM Query:
process_name:"FortiClient" AND (event_type:"process_creation" OR destination_ip:"suspicious_ip")