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High severity · published Jul 29, 2026
CVE-2026-16597
GTM4WP <= 1.22.3 - Unauthenticated Stored Cross-Site Scripting via WooCommerce Billing Fields
7.2
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GA
GTM4WP – A Google Tag Manager (GTM) plugin for WordPress · duracelltomi
through 1.22.3 · source: vendor
Affected product
GA
GTM4WP – A Google Tag Manager (GTM) plugin for WordPress
duracelltomi
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-16597
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-16597
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/duracelltomi-google-tag-manager/tags/1.22.3/integration/woocommerce.php#L265
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/duracelltomi-google-tag-manager/tags/1.22.3/integration/woocommerce.php#L664
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/duracelltomi-google-tag-manager/tags/1.22.3/integration/woocommerce.php#L942
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/duracelltomi-google-tag-manager/tags/1.22.3/public/frontend.php#L1148
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3618063/duracelltomi-google-tag-manager/trunk/public/frontend.php
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset?old_path=%2Fduracelltomi-google-tag-manager/tags/1.22.3&new_path=%2Fduracelltomi-google-tag-manager/tags/1.22.4
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