CVE-2026-55826 The GTM Server Side plugin by stape.io implements server-side tracking on WordPress websites.
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-55826?
CVE-2026-55826 is a high-severity vulnerability in stape-io gtm-server-side-wordpress-plugin, published on 23 Oct 2026.
Official 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.
Weakness: CWE-200
Which versions are affected by CVE-2026-55826?
How do I fix CVE-2026-55826?
No fix has been published for CVE-2026-55826 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-55826 being exploited?
There is no known exploitation of CVE-2026-55826 in the wild and no public exploit code.
Sources
Also known as GHSA-j5j2-gr8c-8rvf.