WordPress: Order Manipulation via Insecure ‘add_offer_in_cart’ Function in Upsell Funnel Builder Plugin

In Upsell Funnel Builder for WooCommerce plugin for WordPress versions up to and including 3.0.0 a medium severity vulnerability CVE-2025-3743 was detected. This vulnerability allows unauthenticated attackers to manipulate the product ID and discount field associated with any order bump, enabling them to arbitrarily update the product and discount when adding it to the cart. To address this issue, users should upgrade Upsell Funnel Builder for WooCommerce plugin to versions 3.0.1 or later. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-3743.