Description
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.
References6
- github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.…
- github.com/stape-io/gtm-server-side-wordpress-plugin/commit/702…
- github.com/stape-io/gtm-server-side-wordpress-plugin/commit/9ff…
- github.com/stape-io/gtm-server-side-wordpress-plugin/releases/t…
- github.com/stape-io/gtm-server-side-wordpress-plugin/security/a…
- github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.…
Metrics
- CVSS 4.0
-
8.7
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 27 · as of 8 November 2026
- CWE
- CWE-200
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.