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CVE-2026-109217

MEDIUM 5.3 CVSS 3.1
Published
October 31, 2026
Last modified
November 5, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-524
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Description

The PDF Invoices & Packing Slips for WooCommerce plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 5.16.5 via the 'invoice_number (via document filename)' parameter. This makes it possible for unauthenticated attackers to extract another customer's complete invoice PDF — including billing identity, shipping address, private order notes, line items, prices, dates, order ID, and invoice number — delivered directly to the attacker's email as an order confirmation attachment. Exploitation requires the plugin's yearly invoice number reset option to be enabled, and the attacker's guest-checkout order must trigger a processing email within 60 seconds of a victim order that shares the same yearly-reset invoice number.

Affected WordPress components

  • PDF Invoices & Packing Slips for WooCommerce Plugin · woocommerce-pdf-invoices-packing-slips
    Confirmed match Active
    Up to and including 5.16.5
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • wpovernight PDF Invoices & Packing Slips for WooCommerce — Up to and including 5.16.5

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Documents/Invoice.php#L146
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Main.php#L181
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Main.php#L239
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/woocommerce-pdf-invoices-packing-slips/tags/5.16.4/includes/Main.php#L253
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?reponame=&old=3759839%40woocommerce-pdf-invoices-packing-slips&new=3759839%40woocommerce-pdf-invoices-packing-slips
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/e68495ad-53ab-4c6b-aecc-1e4bfe34aa0d?source=cve
  • nvd.nist.gov Official NVD record