CVE-2026-55826

The GTM Server Side plugin by stape.io for WordPress is vulnerable to an information disclosure flaw in versions 2.0.0 through 2.1.47 . An unauthenticated attacker can manipulate the gtm_server_side_order_id cookie to trigger the rendering of another customer's full order data, including personal...

CVE-2026-55826 Customer Order Data Exposed via Unauthenticated gtm_server_side_order_id Cookie Manipulation in GTM Server Side WordPress Plugin

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 — includin...