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

Quick assessment

Affected
stape-io gtm-server-side-wordpress-plugin
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

stape.io 开发的 GTM 服务器端插件在 WordPress 网站上实现了服务器端追踪功能。在版本 2.0.0 至 2.1.48（不含 2.1.48）之间，WooCommerce 购买事件追踪机制存在漏洞，允许未认证的攻击者触发渲染其他客户的完整订单数据（包括个人可识别信息，PII）到页面的 JavaScript 数据层（dataLayer）中。该问题已在 2.1.48 版本中修复。

CVSS 8.7 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
stape-io gtm-server-side-wordpress-plugin >= 2.0.0, < 2.1.48 affected
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I. Basic Information for CVE-2026-55826

Vulnerability Information
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Vulnerability Title
Customer Order Data Exposed via Unauthenticated gtm_server_side_order_id Cookie Manipulation in GTM Server Side WordPress Plugin
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
stape-io gtm-server-side-wordpress-plugin >= 2.0.0, < 2.1.48 -

II. Public POCs for CVE-2026-55826

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III. Intelligence Information for CVE-2026-55826

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Patches & Fixes for CVE-2026-55826 (2)

Vendor Advisories for CVE-2026-55826 (1)

Vendor Pages for CVE-2026-55826 (2)

Other References for CVE-2026-55826 (1)

IV. Related Vulnerabilities

Same weakness: CWE-200

V. Comments for CVE-2026-55826

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