Padtraversering in parisneo/lollms-webui

The impact of CVE-2024-8581 is severe. An attacker exploiting this vulnerability can delete any file or directory accessible to the lollms-webui process. This includes critical system files, configuration files, and user data. Successful exploitation could lead to a denial of service, data loss, or even complete system takeover. The ability to delete arbitrary files significantly expands the attack surface beyond simple information disclosure, making this a high-priority vulnerability to address. The lack of input validation means an attacker can craft a malicious filename containing path traversal sequences (e.g., ../../../../etc/passwd) to navigate outside the intended upload directory.

Organizations running lollms-webui, particularly those using it for sensitive data processing or in environments with limited security controls, are at significant risk. Shared hosting environments where multiple users share the same server are particularly vulnerable, as a compromised lollms-webui instance could potentially impact other users on the same server.

• python / server:

import os
import glob

# Check for suspicious files in upload directories
for dirpath, dirnames, filenames in os.walk('/path/to/lollms-webui/uploads'):
    for filename in filenames:
        if '..' in filename:
            print(f'Suspicious filename detected: {os.path.join(dirpath, filename)}')

• linux / server:

# Monitor upload directories for unexpected file modifications
journalctl -f -u lollms-webui | grep 'upload' | grep '..' 

• generic web:

curl -I 'http://your-lollms-webui/upload_app?filename=../../../../etc/passwd' # Check for 403 or other error indicating access denied

1. 2025-03-20Disclosure

   disclosure

2. 2025-03-20Patch

   patch

1. Gereserveerd2024-09-08
2. Gepubliceerd2025-03-20
3. Gewijzigd2025-10-15
4. EPSS bijgewerkt2026-04-02

The primary mitigation for CVE-2024-8581 is to upgrade to version v14 of lollms-webui. This version includes the necessary input validation to prevent path traversal attacks. If upgrading immediately is not possible, consider implementing temporary workarounds. Restrict file upload permissions to the lollms-webui user account to limit the scope of potential damage. Implement a Web Application Firewall (WAF) with rules to block requests containing suspicious path traversal patterns. Carefully review and restrict the directories accessible to the lollms-webui process. After upgrading, verify the fix by attempting to upload a file with a malicious filename containing path traversal sequences (e.g., ../../../../etc/passwd) and confirming that the upload fails with an appropriate error.