What the vulnerability does
01Description
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.
Explanation of Vulnerability in Simple Terms
02Summary
The PDF Invoices & Packing Slips for WooCommerce plugin through version 5.6.0 lacks proper authorization checks on certain functions. A logged-in user with low privileges can modify invoice or packing slip data without proper permission validation. The vulnerability affects data integrity but does not expose sensitive information or disrupt site availability.
What an attacker can do
03Attacker Capabilities
A logged-in user can modify invoice or packing slip records without proper authorization.
Potential impact on your site
04Site Impact
Invoice and packing slip data can be altered by unauthorized users, affecting order records and fulfillment accuracy.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WooCommerce account (e.g., customer or subscriber role).
Key dates
06Disclosure timeline
February 18, 2026
CVE published
April 8, 2026
Record updated
