CVE-2024-6581
📋 TL;DR
This vulnerability in Lollms v9.9 allows attackers to upload malicious SVG files that bypass incomplete sanitization, leading to cross-site scripting (XSS) attacks. When authorized users view these SVG files, attackers can execute arbitrary JavaScript in their browser context, potentially leading to remote code execution. Only users with access to the discussion image upload function are affected.
💻 Affected Systems
- Lollms
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution on the server through chained attacks, complete compromise of user sessions, and potential data exfiltration.
Likely Case
Session hijacking, credential theft, and unauthorized actions performed in the context of authenticated users.
If Mitigated
Limited to client-side impact if proper content security policies and input validation are in place.
🎯 Exploit Status
Exploitation requires authorized user interaction with malicious SVG file.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in commit 328b960a0de2097e13654ac752253e9541521ddd
Vendor Advisory: https://github.com/parisneo/lollms/commit/328b960a0de2097e13654ac752253e9541521ddd
Restart Required: Yes
Instructions:
1. Update Lollms to the latest version. 2. Apply commit 328b960a0de2097e13654ac752253e9541521ddd. 3. Restart the application.
🔧 Temporary Workarounds
Disable SVG uploads
allTemporarily disable SVG file uploads in the discussion image upload function.
Modify application configuration to reject SVG MIME types
Implement strict CSP
allAdd Content Security Policy headers to restrict script execution.
Add 'Content-Security-Policy: script-src 'self'' to HTTP headers
🧯 If You Can't Patch
- Restrict SVG uploads to trusted users only
- Implement server-side SVG sanitization using libraries like DOMPurify
🔍 How to Verify
Check if Vulnerable:
Check if running Lollms v9.9 and test SVG upload with XSS payloads.Check Version:
Check Lollms version in application settings or configuration files.Verify Fix Applied:
Verify application version is updated and test SVG uploads with XSS payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual SVG file uploads
- Multiple failed upload attempts
- Suspicious user agent strings
Network Indicators:
- HTTP requests with SVG files containing script-like content
- Unusual outbound connections after SVG upload
SIEM Query:
source="web_logs" AND (file_extension="svg" AND (content="script" OR content="javascript"))