# GTM4WP <= 2.0.6 - Unauthenticated Sensitive Information Exposure via Cached WooCommerce Reliable Purchase Tracking Pages

- **ID:** WPSEC-2026-2634
- **Plugin:** GTM4WP – A Google Tag Manager (GTM) plugin for WordPress (`duracelltomi-google-tag-manager`), https://wordpress.org/plugins/duracelltomi-google-tag-manager/
- **Affected versions:** from 2.0.0 before 2.1.0
- **Fixed in:** 2.1.0 (Update to 2.1.0 or later.)
- **Severity:** Low 3.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)
- **Weakness:** CWE-524
- **Usage among sites WPSec scans:** plugin High, affected versions High (as of 2026-11-06)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/duracelltomi-google-tag-manager
- **Fix released:** 2026-11-05
- **Published:** 2026-11-06
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2634/

## Description

The GTM4WP – A Google Tag Manager (GTM) plugin for WordPress plugin for WordPress is vulnerable to Sensitive Information Exposure via the WooCommerce Reliable Purchase Tracking feature in all versions from 2.0.0 up to, and including, 2.0.6, due to the plugin writing a shopper's pending purchase into the data layer of whatever page that shopper views next without marking the page as uncacheable. The data can include the purchase event, the raw order data with the buyer's name, addresses, email and phone, and the Enhanced Conversions user data. This makes it possible for unauthenticated attackers to view another shopper's order and customer details when a page cache stores and serves such a page. Exploitation requires Reliable Purchase Tracking to be enabled (it is off by default), the cache-safe data layer to be off, and a page cache that stores pages for visitors with a WooCommerce session.

## References

- https://wpsec.com/vuln/WPSEC-2026-2634/
- https://plugins.svn.wordpress.org/duracelltomi-google-tag-manager/tags/2.1.0/
- https://wordpress.org/plugins/duracelltomi-google-tag-manager/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2634/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.