CVE-2024-6581

The vulnerability allows attackers to upload specially crafted SVG files containing malicious JavaScript code. When other users access the discussion containing this image, the injected script executes in their browser context. This can lead to various attacks, including session hijacking, defacement of the Lollms interface, and potentially, the execution of arbitrary code on the server if the application has write access to files. The impact is particularly severe because the vulnerability can be exploited by authorized users, potentially allowing internal actors to escalate their privileges or compromise the system.

Users of Lollms who rely on the discussion image upload feature are at risk. This includes individuals and organizations using Lollms for collaborative projects, educational purposes, or any scenario where users can upload images to discussions. Specifically, those running older versions (≤11.0.0) are particularly vulnerable.

• python: Examine Lollms application logs for suspicious SVG file uploads or unusual HTTP requests containing SVG content.

# Example: Check for SVG uploads in logs
with open('lollms.log', 'r') as f:
    for line in f:
        if '.svg' in line and 'Content-Type: image/svg+xml' in line:
            print(f'Potential SVG upload detected: {line}')

• generic web: Monitor access logs for requests to the discussion image upload endpoint with SVG files. Look for unusual user agent strings or referrer headers.

# Example: grep for SVG uploads in access logs
grep '.svg' /var/log/apache2/access.log

• generic web: Inspect response headers for unexpected JavaScript code execution. Use browser developer tools to examine the DOM for injected scripts.

1. 2024-10-29Disclosure

   disclosure

1. Reserviert2024-07-08
2. Veröffentlicht2024-10-29
3. Geändert2025-10-09
4. EPSS aktualisiert2026-04-02

The primary mitigation is to upgrade Lollms to version 9.9 or later, which includes the necessary sanitization improvements. As a temporary workaround, restrict file uploads to permitted image formats (e.g., JPEG, PNG) and disable SVG uploads entirely. Implement strict content security policy (CSP) headers to limit the execution of inline scripts and external resources. Regularly review and audit the Lollms configuration to ensure that file upload mechanisms are properly secured.