High 8.7Published Oct 23, 2026

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

Updated under an hour ago (Oct 26, 2026, 7:10 PM ET)

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It affects stape-io gtm-server-side-wordpress-plugin. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.34%, higher than 27% of scored CVEs.

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Every CVE for stape-io gtm-server-side-wordpress-plugin

Exploited in the last 30 days

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 (v4.0, 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
Weakness (CWE): CWE-200
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.34% (percentile 27)
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

stape-io gtm-server-side-wordpress-plugin stape_io:gtm_server_side_wordpress_plugin (from the name)	from 2.0.0, < 2.1.48	CNA record

References

References

https://github.com/stape-io/gtm-server-side-wordpress-plugin/security/advisories/GHSA-j5j2-gr8c-8rvf	x-refsource-confirm
https://github.com/stape-io/gtm-server-side-wordpress-plugin/commit/702898f57772279ca63d3f800336c1803103ea41	x-refsource-misc
https://github.com/stape-io/gtm-server-side-wordpress-plugin/commit/9ff46a050028c40fad5416f2fa35be574c823434	x-refsource-misc
https://github.com/stape-io/gtm-server-side-wordpress-plugin/releases/tag/2.1.48	x-refsource-misc
https://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.48	x-refsource-misc
http://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.47	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.