CVE-2025-56514
📋 TL;DR
This Cross-Site Scripting (XSS) vulnerability in Fiora chat application version 1.0.0 allows attackers to execute arbitrary JavaScript code when users view malicious SVG files. The vulnerability affects all users of the vulnerable Fiora chat application who render SVG content from untrusted sources. Attackers can steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- Fiora chat application
📦 What is this software?
Fiora by Suisuijiang
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover, session hijacking, credential theft, and malware distribution to all users viewing malicious SVG files.
Likely Case
Session cookie theft leading to unauthorized account access, phishing attacks, and user redirection to malicious sites.
If Mitigated
Limited impact with proper content security policies and input validation, potentially only affecting users who manually download and open SVG files.
🎯 Exploit Status
Exploitation requires users to view malicious SVG files; public proof-of-concept code is available in GitHub repositories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Check GitHub repositories for community fixes or implement workarounds.
🔧 Temporary Workarounds
Disable SVG file uploads
allConfigure Fiora to block SVG file uploads entirely to prevent malicious content from being shared.
Modify Fiora configuration to remove 'image/svg+xml' from allowed MIME types
Implement Content Security Policy
allAdd CSP headers to restrict script execution from untrusted sources.
Add 'Content-Security-Policy: default-src 'self'; script-src 'self'' to HTTP headers
🧯 If You Can't Patch
- Restrict SVG file uploads to trusted users only
- Educate users about the risks of opening SVG files from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Test by uploading an SVG file containing JavaScript payload and checking if it executes when viewed.Check Version:
Check Fiora package.json or application version in admin panelVerify Fix Applied:
Test SVG file uploads with JavaScript payloads to ensure they no longer execute.📡 Detection & Monitoring
Log Indicators:
- Unusual SVG file uploads
- Multiple failed SVG upload attempts
- User reports of unexpected redirects
Network Indicators:
- Outbound connections to suspicious domains after SVG viewing
- Unusual JavaScript execution patterns
SIEM Query:
source="fiora" AND (event="file_upload" AND file_extension="svg")