Devs Accounting <= 1.2.0 - Missing Authorization to Unauthenticated Sensitive Information Exposure via 'id' Parameter

The Devs Accounting – Simple Accounting and Invoicing Solution plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.2.0. This is due to the get_single_account() REST API callback being registered with a permission_callback that unconditionally returns true, providing no authentication or authorization checks on the /devs-accounting/v1/get-account/<id> endpoint. This makes it possible for unauthenticated attackers to read arbitrary private financial account records (including account name, bank name, and opening balance) by enumerating the numeric account ID, resulting in sensitive information disclosure.