CVE-2025-58324
📋 TL;DR
This vulnerability allows authenticated attackers to inject malicious scripts into FortiSIEM web pages, which execute when other users view those pages. It affects all versions of FortiSIEM from 6.2 through 7.2.2, potentially compromising user sessions and data.
💻 Affected Systems
- FortiSIEM
📦 What is this software?
Fortisiem by Fortinet
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals administrator credentials, takes full control of FortiSIEM, accesses sensitive security data, and pivots to other systems.
Likely Case
Attacker hijacks user sessions, steals authentication tokens, performs actions as authenticated users, and exfiltrates sensitive information.
If Mitigated
Script execution blocked by browser security controls, limited to same-origin actions with minimal impact.
🎯 Exploit Status
Requires authenticated access and knowledge of vulnerable endpoints; stored XSS means payload persists.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.2.3 or later (check vendor advisory for specific version)
Vendor Advisory: https://fortiguard.fortinet.com/psirt/FG-IR-24-280
Restart Required: No
Instructions:
1. Review vendor advisory for specific patching instructions. 2. Upgrade to FortiSIEM version 7.2.3 or later. 3. Apply patch through FortiSIEM management interface. 4. Verify patch installation and test functionality.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement additional input validation and output encoding for user-supplied data in web interfaces.
Content Security Policy
allDeploy strict Content Security Policy headers to restrict script execution sources.
🧯 If You Can't Patch
- Restrict FortiSIEM access to trusted networks only using firewall rules.
- Implement web application firewall (WAF) with XSS protection rules.
🔍 How to Verify
Check if Vulnerable:
Check FortiSIEM version via admin interface; if version is between 6.2 and 7.2.2 inclusive, system is vulnerable.Check Version:
Login to FortiSIEM web interface and navigate to System > Status to view version.Verify Fix Applied:
Verify version is 7.2.3 or later; test XSS payload injection attempts to confirm they are blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests with script tags or JavaScript code in parameters
- Multiple failed XSS attempts from same source
Network Indicators:
- HTTP requests containing <script> tags or JavaScript in URL parameters or POST data
SIEM Query:
source="fortisiem" AND (http_request CONTAINS "<script>" OR http_request CONTAINS "javascript:")