CVE-2025-59417
📋 TL;DR
Lobe Chat versions before 1.129.4 contain a cross-site scripting (XSS) vulnerability in the SVG rendering component that can be escalated to remote code execution on user machines. Attackers who can inject content into chat messages (via malicious pages, compromised servers, or tool integrations) can exploit this. All users running vulnerable versions are affected.
💻 Affected Systems
- Lobe Chat
📦 What is this software?
Lobe Chat by Lobehub
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution on user machines leading to complete system compromise, data theft, or malware installation.
Likely Case
Session hijacking, credential theft, or unauthorized actions within the chat application via XSS.
If Mitigated
Limited impact with proper input validation and output encoding, potentially only minor UI manipulation.
🎯 Exploit Status
Requires ability to inject content into chat messages, which could be achieved through various attack vectors including prompt injection, compromised MCP servers, or malicious tool integrations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.129.4
Vendor Advisory: https://github.com/lobehub/lobe-chat/security/advisories/GHSA-m79r-r765-5f9j
Restart Required: No
Instructions:
1. Update Lobe Chat to version 1.129.4 or later. 2. Verify the update was successful by checking the version. 3. No restart required for web applications, but ensure all instances are updated.
🔧 Temporary Workarounds
Disable SVG rendering
allTemporarily disable SVG content rendering in chat messages to prevent exploitation.
Modify application configuration to reject or sanitize SVG content in chat messages
Implement Content Security Policy
webAdd strict CSP headers to limit script execution and inline content.
Add Content-Security-Policy header with script-src 'self' and object-src 'none'
🧯 If You Can't Patch
- Implement strict input validation and output encoding for all user-controlled content
- Deploy web application firewall with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check if Lobe Chat version is below 1.129.4 by examining package.json or application version information.Check Version:
Check package.json for version field or use application's built-in version checkVerify Fix Applied:
Confirm version is 1.129.4 or higher and test that SVG content in chat messages is properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual chat messages containing SVG or script tags
- Multiple failed attempts to inject malicious content
Network Indicators:
- HTTP requests containing malicious SVG payloads in chat data
SIEM Query:
source="web_logs" AND (message="<svg" OR message="<script") AND status=200