CVE-2026-55826 Details
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.
A vulnerability in the GTM Server Side plugin for WordPress, specifically in versions 2.0.0 prior to 2.1.48, allows unauthenticated attackers to access and manipulate WooCommerce order data. The issue arises from the plugin's purchase event tracking, which can inadvertently expose full order details, including personally identifiable information (PII), through the JavaScript dataLayer on any page of the site.
Users should update the GTM Server Side WordPress plugin to version 2.1.48 or later. After updating, clear any full-page cache and review cached pages for exposed customer data.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 23, 2026CISA-ADP
Assessed Oct 29, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| stape.io GTM Server Side | >= 2.0.0, <= 2.1.46 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 29, 2026 | CVE Modified | CISA-ADP |
| Oct 23, 2026 | New CVE Received | [email protected] |