CVE-2026-109220 Details
Description
The PDF Invoice for WooCommerce + Drag and Drop Template Builder plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 7.1.1 via the 'customer_note' parameter parameter. This is due to insufficient sanitization of the customer_note checkout field, which is inlined verbatim into invoice HTML, entity-decoded back into a live tag by simplehtmldom, reassembled into raw bytes by mPDF, and passed to unserialize() in _getObjAttr without validation. This makes it possible for unauthenticated attackers to execute code on the server. An unauthenticated attacker can trigger the vulnerable code path on a default install by placing an anonymous WooCommerce checkout via the public Store API (POST /wc/store/v1/checkout) using a Direct Bank Transfer or cheque payment method, which automatically transitions the order to 'on-hold' status and fires the plugin's invoice-generation hook.
A PHP Object Injection vulnerability has been identified in the PDF Invoice for WooCommerce + Drag and Drop Template Builder plugin for WordPress, affecting all versions through 7.1.1. The vulnerability arises from inadequate sanitization of the 'customer_note' parameter in the checkout field. This unsanitized data is directly inserted into the invoice HTML, where it is entity-decoded into a live tag by simplehtmldom, then converted into raw bytes by mPDF, and finally passed to the 'unserialize()' function in '_getObjAttr' without any validation. This exploitation allows unauthenticated attackers to execute arbitrary code on the server. The vulnerability can be triggered on a default installation by placing an anonymous WooCommerce order through the public Store API, using either the Direct Bank Transfer or cheque payment method. This process automatically changes the order status to 'on-hold' and activates the invoice-generation hook for the plugin.
Users are advised to update the PDF Invoice for WooCommerce + Drag and Drop Template Builder plugin to version 7.2.0 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 31, 2026CISA-ADP
Assessed Nov 3, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-502 | Deserialization of Untrusted Data | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| PDF Invoice for WooCommerce | <= 7.1.1 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 3, 2026 | CVE Modified | CISA-ADP |
| Oct 31, 2026 | New CVE Received | [email protected] |