CVE-2025-65790
📋 TL;DR
A reflected cross-site scripting vulnerability in FuguHub 8.1 allows attackers to execute arbitrary JavaScript in victims' browsers by tricking them into opening malicious SVG files. This affects all users of FuguHub 8.1 who access the /fs/ file manager interface. Attackers can steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- FuguHub
📦 What is this software?
Fuguhub by Realtimelogic
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover, data theft, and privilege escalation if attacker steals admin session cookies or performs malicious actions as authenticated users.
Likely Case
Session hijacking, credential theft, and unauthorized actions performed in victims' browser context.
If Mitigated
Limited impact if proper content security policies are enforced and users don't open untrusted SVG files.
🎯 Exploit Status
Exploitation requires victim interaction (opening malicious SVG file) but is technically simple with public proof-of-concept available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://fuguhub.com/
Restart Required: No
Instructions:
No official patch available. Monitor vendor website for security updates. Consider workarounds or alternative solutions.
🔧 Temporary Workarounds
Disable SVG file serving
allConfigure web server or application to block SVG file types from being served through the /fs/ interface.
# Apache: Add to .htaccess or virtual host config
<FilesMatch "\.svg$">
Deny from all
</FilesMatch>
# Nginx: Add to server block
location ~*\.svg$ {
deny all;
}
Implement Content Security Policy
allAdd CSP headers to prevent inline script execution in SVG files.
# Add to web server configuration or application headers
Content-Security-Policy: script-src 'self'; object-src 'none';
🧯 If You Can't Patch
- Implement WAF rules to block SVG files containing script tags or JavaScript content.
- Restrict access to /fs/ interface to trusted users only using authentication and IP whitelisting.
🔍 How to Verify
Check if Vulnerable:
Upload an SVG file containing <script>alert('XSS')</script> to /fs/ interface and attempt to access it. If alert triggers, system is vulnerable.Check Version:
Check FuguHub admin interface or configuration files for version information. Typically found in admin panel or /version endpoint.Verify Fix Applied:
Test with same malicious SVG file after implementing workarounds. Alert should not trigger and file should be blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual SVG file uploads to /fs/ endpoint
- Multiple failed SVG file access attempts
- Requests to /fs/ with SVG files containing script patterns
Network Indicators:
- HTTP requests for SVG files with suspicious parameters or content
- Traffic patterns showing SVG file uploads followed by immediate access
SIEM Query:
source="web_logs" AND uri_path="/fs/*.svg" AND (http_user_agent CONTAINS "script" OR http_referer CONTAINS "svg")