CVE-2026-55826
The GTM Server Side plugin by stape.io implements server-side tracking on WordPress websites
- Risk score
- 67/100
- CVSS
- 8.7 v4.0
- Exploit chance (30 days)
- 0.6%
- Published
- 23 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- The GTM Server Side plugin by stape.io has a vulnerability in WooCommerce purchase event tracking from version 2.0.0 to 2.1.48, allowing an unauthenticated attacker to access another customer's full order data, including PII. This could be used to steal sensitive information.
- Affected
- {'products': ['GTM Server Side plugin'], 'packages': ['WordPress'], 'versions': ['2.0.0', '2.1.48']}
- Fix
- Upgrade to version 2.1.48 or later
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 8.7 high
- Remotely exploitable without logging in
References
- http://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.47
- https://github.com/stape-io/gtm-server-side-wordpress-plugin/commit/702898f57772279ca63d3f800336c1803103ea41
- https://github.com/stape-io/gtm-server-side-wordpress-plugin/commit/9ff46a050028c40fad5416f2fa35be574c823434
- https://github.com/stape-io/gtm-server-side-wordpress-plugin/releases/tag/2.1.48
- https://github.com/stape-io/gtm-server-side-wordpress-plugin/security/advisories/GHSA-j5j2-gr8c-8rvf
- https://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.48
Original 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.
Last activity 23 Oct 2026. Patch Forecast updates every hour.