Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Wham Checkout Files Upload for WooCommerce allows Stored XSS. This issue affects Checkout Files Upload for WooCommerce: from n/a through 2.2.0.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.