CVE-2026-11496: Auth Bypass (CVSS 6.5)

Description

The Woo PDF Invoice Builder plugin (also distributed as "PDF Builder for WooCommerce") for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.0.8. This is due to the InspectOrder() AJAX handler (woocommerce-pdf-invoice-ajax.php:513), registered on wp_ajax_rednao_wcpdfinv_inspect_order, performing no capability check and no nonce verification before loading an arbitrary order by the attacker-supplied 'OrderNumber' POST field and serializing its full WC_Order::get_data() and meta to the response. This makes it possible for authenticated attackers with Subscriber-level access and above to read every WooCommerce order on the site — including billing/shipping address, email, phone number, payment method, gateway transaction ID, and order totals — by iterating order IDs.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0026

Probability of exploitation

0.18%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-862 Missing Authorization

References

Other References

https://plugins.trac.wordpress.org/browser/woo-pdf-invoice-builder/tags/2.0.8/utilities/WCInspector.php#L23 https://plugins.trac.wordpress.org/browser/woo-pdf-invoice-builder/tags/2.0.8/woocommerce-pdf-invoice-ajax.php#L46 https://plugins.trac.wordpress.org/browser/woo-pdf-invoice-builder/tags/2.0.8/woocommerce-pdf-invoice-ajax.php#L513 https://plugins.trac.wordpress.org/browser/woo-pdf-invoice-builder/trunk/woocommerce-pdf-invoice-ajax.php#L513 https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3567364%40woo-pdf-invoice-builder%2Ftrunk%2Fwoocommerce-pdf-invoice-ajax.php&old=3544283%40woo-pdf-invoice-builder%2Ftrunk%2Fwoocommerce-pdf-invoice-ajax.php&sfp_email=&sfph_mail= https://wordpress.org/plugins/woo-pdf-invoice-builder/ https://www.wordfence.com/threat-intel/vulnerabilities/id/5e3e7c1a-a9c0-4e92-868c-5785d891cf8f?source=cve

Frequently Asked Questions

What is CVE-2026-11496? +

The Woo PDF Invoice Builder plugin (also distributed as "PDF Builder for WooCommerce") for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.0.8. This is due to the InspectOrder() AJAX handler (woocommerce-pdf-invoice-ajax.php:513), registered on wp_ajax_rednao_wcpdfinv_inspect_order, performing no capability check and no nonce verification before loading an arbitrary order by the attacker-supplied 'OrderNumber' POST field and serializing its full WC_Order::get_data() and meta to the response. This makes it possible for authenticated attackers with Subscriber-level access and above to read every WooCommerce order on the site — including billing/shipping address, email, phone number, payment method, gateway transaction ID, and order totals — by iterating order IDs. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-11496? +

CVE-2026-11496 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0026, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-11496? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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