CVE-2026-12128: Pinpoint Booking System <= 2.9.9.6.8 - Unauthenticated Improper Input Validation to Price Manipulation via 'cart_data' Parameter

The Pinpoint Booking System – Version 2 plugin for WordPress is vulnerable to Price Manipulation via the cartdata parameter in all versions up to, and including, 2.9.9.6.8. This is due to the dopbspwoocommerceaddtocart AJAX action being registered via wpajaxnopriv with no authentication, no nonce verification, and no server-side recalculation of pricing — the update handler reads pricetotal directly from the attacker-controlled cartdata POST parameter and persists it to the database via $wpdb->insert() without validating it against the calendar's configured pricing. The woocommercebeforecalculatetotals callback subsequently reads the stored attacker-supplied value back from the database and passes it directly to $product->setprice() without recomputing from calendar settings. This makes it possible for unauthenticated attackers to override the WooCommerce checkout price of any bookable product tied to a booking calendar to an arbitrary value, effectively enabling the purchase of any such product at a self-chosen price.