Vulnerability details
CVE-2026-55826
stape-io gtm-server-side-wordpress-plugin
Customer Order Data Exposed via Unauthenticated gtm_server_side_order_id Cookie Manipulation in GTM Server Side WordPress Plugin
CVSS 4.0
8.7High
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| stape-io | gtm-server-side-wordpress-plugin | >= 2.0.0, < 2.1.48 | CVEProject cvelistV5 (CNA) |
References and advisories
6- 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
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Details
- Published
- 2026-10-23
- Last updated
- 2026-10-29
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.33%
Probability of exploitation in 30 days
27.2%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-200Exposure of Sensitive Information to an Unauthorized Actor