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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Woocommerce Pdf Invoices Packing Slips Plugin | — | Update woocommerce-pdf-invoices-packing-slips plugin to version 5.7.0, or a newer patched version | Feb 18, 2026 | Feb 17, 2026 |
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