CVE-2026-107750
Received Received - Intake

Stored XSS in PDF Invoices & Packing Slips for WooCommerce

Publication date: 2026-10-31

Last updated on: 2026-10-31

Assigner: Wordfence

Description
The PDF Invoices & Packing Slips for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'billing_address.first_name / last_name / company, customer_note' parameter in all versions up to, and including, 5.16.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is an incomplete fix for CVE-2026-92244: the wp_kses() allow-list introduced in 5.16.2 correctly blocks raw-tag payloads but is bypassed by entity-encoded payloads (e.g., <img onerror=…>) that contain no literal angle-bracket characters and are therefore passed through unmodified before the trailing decode rematerializes them.

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Meta Information

Published
2026-10-31
Last Modified
2026-10-31
Generated
2026-10-31
AI Q&A
2026-10-31
EPSS Evaluated
N/A
NVD
CVE-2026-107750
EUVD
EUVD-2026-114607

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wpovernight PDF Invoices & Packing Slips for WooCommerce 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the PDF Invoices & Packing Slips for WooCommerce WordPress plugin. It allows unauthenticated attackers to inject malicious scripts via parameters like billing_address.first_name, last_name, company, or customer_note due to insufficient input sanitization and output escaping. The injected scripts execute when users access affected pages.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using the PDF Invoices & Packing Slips for WooCommerce plugin versions up to 5.16.4. Check for malicious scripts in billing address fields or customer notes. Use commands like grep to search for encoded payloads such as <img or > in database entries or plugin files.

Impact Analysis

This vulnerability can allow attackers to steal user sessions, deface websites, or redirect users to malicious sites. It may also enable phishing attacks or unauthorized actions on behalf of users. The impact depends on the attacker's goals and the site's user base.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR or HIPAA if it results in unauthorized access to personal data or protected health information. Stored XSS may expose sensitive user data, violating confidentiality requirements and triggering regulatory penalties.

Mitigation Strategies

Update the PDF Invoices & Packing Slips for WooCommerce plugin to the latest version beyond 5.16.4 to address the incomplete fix for CVE-2026-92244.

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