The EU VAT Assistant for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'vat_number' parameter in all versions up to, and including, 2.1.30.260413 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. The stored payload executes in the administrator's browser context when reviewing an order via WooCommerce → Orders → Edit Order, enabling privilege escalation up to and including full site takeover via rogue administrator account creation.
History

Wed, 21 Oct 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Daigo75
Daigo75 eu Vat Assistant For Woocommerce
Wordpress-extensions
Wordpress-extensions eu Vat Assistant For Woocommerce
Vendors & Products Daigo75
Daigo75 eu Vat Assistant For Woocommerce
Wordpress-extensions
Wordpress-extensions eu Vat Assistant For Woocommerce

Sun, 18 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 17 Oct 2026 04:00:00 +0000

Type Values Removed Values Added
Description The EU VAT Assistant for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'vat_number' parameter in all versions up to, and including, 2.1.30.260413 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. The stored payload executes in the administrator's browser context when reviewing an order via WooCommerce → Orders → Edit Order, enabling privilege escalation up to and including full site takeover via rogue administrator account creation.
Title EU VAT Assistant for WooCommerce <= 2.1.30.260413 - Unauthenticated Stored Cross-Site Scripting via 'vat_number' Parameter
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published: 2026-10-17T03:43:30.740Z

Updated: 2026-10-18T11:12:33.948Z

Reserved: 2026-10-01T13:55:27.399Z

Link: CVE-2026-103899

cve-icon Vulnrichment

Updated: 2026-10-18T11:06:58.248Z

cve-icon NVD

Status : Deferred

Published: 2026-10-17T04:16:47.413

Modified: 2026-10-19T15:16:45.150

Link: CVE-2026-103899

cve-icon Redhat

No data.