Laravel, File Validation Bypass, CVE-2025-XXXX (Critical)

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How the Mentioned CVE Works:

The vulnerability in Laravel (CVE-2025-XXXX) arises when using wildcard validation for file or image field arrays (files.). Attackers can craft malicious requests that bypass the validation rules, allowing unauthorized file uploads. This occurs due to improper handling of array-based file inputs in affected versions (>= 12.0.0, < 12.1.1 and < 11.44.1). By exploiting this flaw, attackers can upload malicious files, potentially leading to remote code execution, data breaches, or server compromise. Patched versions (12.1.1 and 11.44.1) address this issue by properly validating array-based file inputs.

DailyCVE Form:

Platform: Laravel
Version: >= 12.0.0, < 12.1.1; < 11.44.1
Vulnerability: File Validation Bypass
Severity: Critical
Date: Mar 5, 2025

(End of form)

What Undercode Say:

Exploitation:

1. Craft a malicious file upload request using tools like `Burp Suite` or Postman.
2. Use array-based file inputs (files.) to bypass validation.
3. Upload a malicious file (e.g., `.php` or .exe) to the server.
4. Execute the uploaded file to gain control over the server.

Protection:

1. Update Laravel to patched versions (12.1.1 or 11.44.1).

2. Implement strict file validation rules.

3. Use additional server-side file type checks.

4. Restrict file upload permissions.

Commands:

• Update Laravel:

  composer require laravel/framework:12.1.1
  

• Verify version:

  php artisan --version
  

Code Snippets:

• Strict file validation:

  $request->validate([
  'files.' => 'required|mimes:jpg,png|max:2048',
  ]);
  

• Server-side file type check:

  $file = $request->file('files.0');
  if ($file->getClientMimeType() !== 'image/jpeg') {
  abort(403, 'Invalid file type.');
  }
  

URLs:

• Laravel Security Advisory: https://laravel.com/docs/security
• GitHub Advisory: https://github.com/advisories
• CVE Details: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-XXXX

Analytics:

• Affected versions: 12.0.0 to 12.1.0, below 11.44.1
• Patched versions: 12.1.1, 11.44.1
• Severity score: 9.8 (CVSS v3)
• Exploitability: High
• Impact: Critical
  By following these steps, developers can mitigate the risk of this critical vulnerability and secure their Laravel applications.

References:

Reported By: https://github.com/advisories/GHSA-78fx-h6xr-vch4
Extra Source Hub:
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