CVE-2026-109220
9.8, criticalAddonsorg PDF Invoice for WooCommerce + Drag and Drop Template Builder Deserialization of Untrusted Data Vulnerability
- CVSS
- 9.8, critical critical CVSS v3.1
- EPSS, next 30 days
- 0.5% higher than 44.2% of scored CVEs
- Exploitation
- No public evidence
- Published
- 31 Oct 2026yesterday
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.
Details
- Vendor
- Addonsorg
- Product
- PDF Invoice for WooCommerce + Drag and Drop Template Builder
- Weakness
- CWE-502 (opens in a new tab)
- Status
- Received
- Updated
- 31 Oct 2026
- Assigner
- security@wordfence.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References 8
Other references 8
- downloads.wordpress.org /plugin/pdf-for-woocommerce.7.2.0.zip (opens in a new tab)
- plugins.trac.wordpress.org /browser/pdf-for-woocommerce/tags/7.1.1/frontend/index.php#L378 (opens in a new tab)
- plugins.trac.wordpress.org /browser/pdf-for-woocommerce/tags/7.1.1/libs/HtmlDocument.php#L300 (opens in a new tab)
- plugins.trac.wordpress.org /browser/pdf-for-woocommerce/tags/7.1.1/libs/HtmlNode.php#L1266 (opens in a new tab)
- plugins.trac.wordpress.org /browser/pdf-for-woocommerce/tags/7.1.1/vendor/mpdf/mpdf/src/Mpdf.php#L9105 (opens in a new tab)
- plugins.trac.wordpress.org /browser/pdf-for-woocommerce/tags/7.1.1/woocommerce/emails/index.php#L70 (opens in a new tab)
- plugins.trac.wordpress.org /browser/pdf-for-woocommerce/tags/7.1.1/woocommerce/shortcodes.php#L708 (opens in a new tab)
- wordfence.com /threat-intel/vulnerabilities/id/1bc3529c-6161-4b89-8a35-c3a9b7b8c308?source=cve (opens in a new tab)
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Beyond this page
Is CVE-2026-109220 in your network?
This page tells you how dangerous CVE-2026-109220 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
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EXYS7600 OCELOT
Find it before attackers do
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EXYS7950 KONDRA
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Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
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Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 1 Nov 2026, not the live upstream state.