wpovernight PDF Invoices & Packing Slips for WooCommerce Plugin information disclosure

Summaryinfo

A vulnerability classified as problematic has been found in wpovernight PDF Invoices & Packing Slips for WooCommerce Plugin up to 5.16.5. The impacted element is an unknown function. The manipulation of the argument invoice_number leads to information disclosure. This vulnerability is documented as CVE-2026-109217. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in wpovernight PDF Invoices & Packing Slips for WooCommerce Plugin up to 5.16.5. This issue affects some unknown processing. The manipulation of the argument invoice_number with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-109217 since 10/12/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/31/2026). The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• wpovernight

Name

• PDF Invoices & Packing Slips for WooCommerce Plugin

Version

• 5.16.0
• 5.16.1
• 5.16.2
• 5.16.3
• 5.16.4
• 5.16.5

CPE 2.3info

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CPE 2.2info

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