PDF Invoices & Packing Slips for WooCommerce <= 5.16.3 - Authenticated (Subscriber+) Missing Authorization to Order Information Disclosure via Document Number Preview
- ID
- WPSEC-2026-0740
- Plugin
- PDF Invoices & Packing Slips for WooCommerce (woocommerce-pdf-invoices-packing-slips)
- Affected
- all versions before 5.16.4
- Remediation
- Update to 5.16.4 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Weakness
- CWE-862
- Usage
- Plugin Low · Affected versions None seen among sites WPSec scans, 2026-10-10
- Attack surface
- PDF Invoices & Packing Slips for WooCommerce on WPSec AttackSurface
- Fix released
- Published
Description
The PDF Invoices & Packing Slips for WooCommerce plugin for WordPress is vulnerable to unauthorized access of data via the wpo_wcpdf_preview_formatted_number AJAX action in all versions up to, and including, 5.16.3, due to a missing capability check in the ajax_preview_formatted_number() function, which only verifies a nonce that is also handed to logged-in customers in their My Account document links. This makes it possible for authenticated attackers, with Subscriber-level access and above, to load arbitrary orders by ID and retrieve their order number and the order and document dates through the number format placeholders.
References
- https://wpsec.com/vuln/WPSEC-2026-0740/
- https://plugins.svn.wordpress.org/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/
- https://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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