CVE-2026-55826
CVE-2026-55826 · Customer Order Data Exposed via Unauthenticated gtm_server_side_order_id Cookie Manipulation in GTM Server Side WordPress Plugin
This page contains facts from public vulnerability sources. Check the original advisory before updating.
The GTM Server Side plugin by stape.io implements server-side tracking on WordPress websites. From version 2.0.0 to before version 2.1.48, the WooCommerce purchase event tracking mechanism allows an unauthenticated attacker to trigger the rendering of another customer's full order data — including personally identifiable information (PII) — into the page's JavaScript dataLayer. This issue has been patched in version 2.1.48.
CVSS 8.7 · High
- Published
- Updated
Affected products and versions
gtm-server-side-wordpress-plugin
- Versions
- >= 2.0.0, < 2.1.48: Affected
No fix published
Original sources
- https://github.com/stape-io/gtm-server-side-wordpress-plugin/security/advisories/GHSA-j5j2-gr8c-8rvf
- https://github.com/stape-io/gtm-server-side-wordpress-plugin/commit/702898f57772279ca63d3f800336c1803103ea41
- https://github.com/stape-io/gtm-server-side-wordpress-plugin/commit/9ff46a050028c40fad5416f2fa35be574c823434
- https://github.com/stape-io/gtm-server-side-wordpress-plugin/releases/tag/2.1.48
- https://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.48
- http://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.47
- https://nvd.nist.gov/vuln/detail/CVE-2026-55826