CVE-2026-48014: Shopware: Admin API ACL Bypass in Order State Transition Endpoints

This is a vertical authorization bypass in the Admin API affecting order state transition features (/api/_action/order/{orderId}/state/{transition} and similar transaction/delivery transition routes). The root cause is that the transition action routes do not declare required server-side ACL privileges, allowing low-privileged users to pass the authorization boundary. As a result, authenticated users without order:update can still change order states, causing real security impact such as operational integrity loss, automation workflow misuse, and fulfillment/settlement/support process disruption.