GTM4WP <= 1.22.3 - Unauthenticated Stored Cross-Site Scripting via WooCommerce Billing Fields

2026-07-28 20:33

lhking

Strategic Overview

Status

Patched in 1.22.4

Affected PluginGTM4WP – A Google Tag Manager (GTM) plugin for WordPress

Affected Version<= 1.22.3

CVSS7.2High

CVECVE-2026-16597

View all GTM4WP – A Google Tag Manager (GTM) plugin for WordPress vulnerabilities

Vulnerability Overview

The GTM4WP – A Google Tag Manager (GTM) plugin for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via WooCommerce Billing Fields in all versions up to, and including, 1.22.3 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 requires the GTM4WP WooCommerce order data integration option (GTM4WP_OPTION_INTEGRATE_WCORDERDATA) to be enabled, and is exploited by placing a guest checkout order with a JavaScript payload in a WooCommerce billing field such as the billing first name.

Technical Analysis

REMEDIATION: Update to version 1.22.4, or a newer patched version --- IDENTIFIER: CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) 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.

External References

https://www.cve.org/CVERecord?id=CVE-2026-16597 https://www.wordfence.com/threat-intel/vulnerabilities/id/03542812-b6e5-421d-9ba6-43f1c779940f

CVSS Vector

7.2

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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