Overview
Real-world impact: CVE-2017-14704 describes multiple unrestricted file upload vulnerabilities in the Claydip Laravel Airbnb Clone 1.0. Because an authenticated user could upload a file with an executable extension to a public path, an attacker could trigger remote code execution by visiting the uploaded file's URL in images/profile. This illustrates how weak file upload handling and permissive web server configuration can turn an otherwise normal feature into an attack surface.
Exploitation details: The flaws occurred in the imageSubmit and proof_submit endpoints. Without validating the file type, preventing executable extensions, or restricting where uploads are stored, the attacker could place a PHP payload and access it directly via a URL, bypassing application logic.
Laravel remediation approach: Treat uploads as untrusted input. Validate mime types with Laravel's validator, restrict extensions, generate safe filenames, and store uploads outside the web root or serve them through controlled routes. Harden the server to disable execution in the uploads directory and avoid rendering user content directly from public folders.
Additional security best practices: Require authentication for upload endpoints, log uploads, implement file scanning, and consider using a dedicated storage or CDN with signed URLs. The CVE shows the importance of end-to-end controls across input validation, storage, and access.
Affected Versions
Claydip Laravel Airbnb Clone 1.0
Code Fix Example
Laravel API Security Remediation
VULNERABLE PATTERN:
public function uploadImage(Request $request) {
if ($request->hasFile('image')) {
$image = $request->file('image');
$imageName = $image->getClientOriginalName();
$destinationPath = public_path('/images/profile');
$image->move($destinationPath, $imageName);
}
return response()->json(['status' => 'ok']);
}
FIXED:
public function uploadImage(Request $request) {
$request->validate([
'image' => 'required|image|mimes:jpeg,png,gif,bmp|max:2048',
]);
$image = $request->file('image');
$name = Str::random(40) . '.' . $image->getClientOriginalExtension();
// Store outside web root
$path = $image->storeAs('uploads', $name, 'local');
// If you need public access, serve via a controller or generate a temporary URL
return response()->json(['path' => $path]);
}