InPost PL < 1.9.1 - Unauthenticated WooCommerce Order Parcel-Locker Hijacking

The InPost PL WordPress plugin before 1.9.1 does not verify that the request originates from the legitimate buyer before allowing the WooCommerce order parcel-locker destination to be updated, allowing unauthenticated attackers to silently redirect the shipping destination of any pending or processing order on the site.