CVE-2026-55826 (GCVE-0-2026-55826)

Vulnerability from cvelistv5 – Published: 2026-10-23 13:27 – Updated: 2026-10-23 13:27
VLAI
Title
Customer Order Data Exposed via Unauthenticated gtm_server_side_order_id Cookie Manipulation in GTM Server Side WordPress Plugin
Summary
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.
Severity
8.7 (High)
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
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7761 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
stape-io gtm-server-side-wordpress-plugin Affected: >= 2.0.0, < 2.1.48
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
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          "vendor": "stape-io",
          "versions": [
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          "value": "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\u0027s full order data \u2014 including personally identifiable information (PII) \u2014 into the page\u0027s JavaScript dataLayer. This issue has been patched in version 2.1.48."
        }
      ],
      "metrics": [
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            "vectorString": "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",
            "version": "4.0",
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            "vulnConfidentialityImpact": "HIGH",
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          }
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      "problemTypes": [
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              "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
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      "providerMetadata": {
        "dateUpdated": "2026-10-23T13:27:45.250Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
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        },
        {
          "name": "https://github.com/stape-io/gtm-server-side-wordpress-plugin/commit/9ff46a050028c40fad5416f2fa35be574c823434",
          "tags": [
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          "url": "https://github.com/stape-io/gtm-server-side-wordpress-plugin/commit/9ff46a050028c40fad5416f2fa35be574c823434"
        },
        {
          "name": "https://github.com/stape-io/gtm-server-side-wordpress-plugin/releases/tag/2.1.48",
          "tags": [
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          ],
          "url": "https://github.com/stape-io/gtm-server-side-wordpress-plugin/releases/tag/2.1.48"
        },
        {
          "name": "https://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.48",
          "tags": [
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          "url": "https://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.48"
        },
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          "name": "http://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.47",
          "tags": [
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          "url": "http://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.47"
        }
      ],
      "source": {
        "advisory": "GHSA-j5j2-gr8c-8rvf",
        "discovery": "UNKNOWN"
      },
      "title": "Customer Order Data Exposed via Unauthenticated gtm_server_side_order_id Cookie Manipulation in GTM Server Side WordPress Plugin"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-55826",
    "datePublished": "2026-10-23T13:27:45.250Z",
    "dateReserved": "2026-06-17T16:29:38.864Z",
    "dateUpdated": "2026-10-23T13:27:45.250Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "date": "2026-10-25",
      "epss": "0.00337",
      "percentile": "0.26865"
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    "nvd": {
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                "product": "gtm-server-side-wordpress-plugin",
                "vendor": "stape-io",
                "versions": [
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                    "status": "affected",
                    "version": "\u003e= 2.0.0, \u003c 2.1.48"
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          }
        ],
        "id": "CVE-2026-55826",
        "lastModified": "2026-10-23T19:57:42.660",
        "metrics": {
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 8.7,
                "baseSeverity": "HIGH",
                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
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              "type": "Secondary"
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        "published": "2026-10-23T14:17:54.017",
        "references": [
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            "url": "http://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.47"
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          },
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            "source": "security-advisories@github.com",
            "url": "https://github.com/stape-io/gtm-server-side-wordpress-plugin/tree/v2.1.48"
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        "vulnStatus": "Deferred",
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            "source": "security-advisories@github.com",
            "type": "Primary"
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  }
}



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