PDF Invoices & Packing Slips for WooCommerce

The PDF Invoices & Packing Slips for WooCommerce plugin for WordPress is vulnerable to PHP Object Injection in versions up to 5.9.0 via deserialization of untrusted input. This makes it possible for authenticated attackers, with shop manager-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

The PDF Invoices & Packing Slips for WooCommerce plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.6.0 via the `wpo_ips_edi_save_order_customer_peppol_identifiers` AJAX action due to missing capability checks and order ownership validation. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify Peppol/EDI endpoint identifiers (`peppol_endpoint_id`, `peppol_endpoint_eas`) for any customer by specifying an arbitrary `order_id` parameter on systems using Peppol invoicing. This can affect order routing on the Peppol network and may result in payment disruptions and data leakage.

The PDF Invoices & Packing Slips for WooCommerce plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in all versions up to, and including, 4.9.1. This makes it possible for authenticated attackers, with Contributor-level access and above, to perform an unauthorized action.