CVE-2024-5933
📋 TL;DR
This Cross-site Scripting (XSS) vulnerability in parisneo/lollms-webui allows attackers to inject malicious JavaScript via chat messages, which executes in victims' browsers when they view those messages. It affects all users of the vulnerable web interface. The vulnerability enables session hijacking, credential theft, and other client-side attacks.
💻 Affected Systems
- parisneo/lollms-webui
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals session cookies, gains unauthorized access to user accounts, performs actions as authenticated users, and potentially compromises the entire application.
Likely Case
Attacker steals session tokens or credentials, leading to account takeover and unauthorized access to chat functionality and associated data.
If Mitigated
With proper input validation and output encoding, malicious scripts are neutralized before execution, preventing any client-side compromise.
🎯 Exploit Status
XSS payloads can be delivered via chat messages without authentication. Exploitation requires victim interaction with malicious chat messages.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check latest release on GitHub repository
Vendor Advisory: https://huntr.com/bounties/51a2e370-3b64-45cd-9afc-0e4856ab5517
Restart Required: Yes
Instructions:
1. Update to the latest version of lollms-webui from the official GitHub repository. 2. Restart the webui service. 3. Verify the fix by testing XSS payloads in chat.
🔧 Temporary Workarounds
Input Sanitization
allImplement server-side input validation and output encoding for chat messages
Implement HTML entity encoding for user-controlled chat content before rendering
Content Security Policy
allImplement strict CSP headers to prevent script execution from untrusted sources
Add 'Content-Security-Policy: script-src 'self'' header to web server configuration
🧯 If You Can't Patch
- Disable chat functionality completely if not essential
- Implement web application firewall (WAF) rules to block XSS payloads in chat messages
🔍 How to Verify
Check if Vulnerable:
Test by sending chat messages containing basic XSS payloads like <script>alert('XSS')</script> and checking if they executeCheck Version:
Check package.json or repository version in lollms-webui installation directoryVerify Fix Applied:
After patching, test with same XSS payloads to confirm they are properly sanitized and don't execute📡 Detection & Monitoring
Log Indicators:
- Chat messages containing script tags, javascript: URIs, or other XSS patterns
- Unusual chat activity patterns
Network Indicators:
- HTTP requests with XSS payloads in POST data to chat endpoints
SIEM Query:
source="web_logs" AND (message="*<script>*" OR message="*javascript:*") AND endpoint="*/chat*"