Easy Preloader <= 1.0.0 - Authenticated Stored Cross-Site Scripting (XSS)

Step 1: Install the plugin "Easy Preloader"

Step 2: Enter the payload below in the text field "Choose overlay color" (or any other text fields) in the plugin's settings (wp-admin/options-general.php?page=ep-options)

"><script>alert(/XSS/)</script>

Step 3: The script will be stored and executed all the times when going to the plugin settings.