Shop manager PHP Object Injection in WooCommerce PDF Invoices & Packing Slips < 5.9.0 versions.

woocommerce-pdf-invoices-packing-slips is an extension which allows users to create, print & automatically email PDF invoices & packing slips for WooCommerce orders. This vulnerability allows unauthorized users to access any PDF document from a store if they: 1. Have access to a guest document link and 2. Replace the URL variable my-account with bulk. The issue occurs when: 1. The store's document access is set to "guest." and 2. The user is logged out. This vulnerability compromises the confidentiality of sensitive documents, affecting all stores using the plugin with the guest access option enabled. This issue has been addressed in version 4.0.0 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

The woocommerce-pdf-invoices-packing-slips plugin before 2.0.13 for WordPress has XSS via the tab or section variable on settings screens.

The WooCommerce PDF Invoices & Packing Slips WordPress plugin before 2.16.0 doesn't escape a parameter on its setting page, making it possible for attackers to conduct reflected cross-site scripting attacks.

The WooCommerce PDF Invoices & Packing Slips WordPress plugin before 3.0.1 does not sanitise and escape some parameters before outputting them back in an attributes of an admin page, leading to Reflected Cross-Site Scripting.

Missing Authorization vulnerability in WP Overnight WooCommerce PDF Invoices & Packing Slips woocommerce-pdf-invoices-packing-slips allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WooCommerce PDF Invoices & Packing Slips: from n/a through <= 3.8.6.

The WooCommerce PDF Invoices & Packing Slips WordPress plugin before 2.10.5 does not escape the tab and section parameters before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting in the admin dashboard