CVE-2026-19907 (GCVE-0-2026-19907)

Vulnerability from cvelistv5 – Published: 2026-11-14 12:33 – Updated: 2026-11-14 12:33
VLAI
Title
Shipo 1.6 - 1.8.0 - Authentication Bypass to Administrator
Summary
The Shipo plugin for WordPress is vulnerable to Authentication Bypass in versions 1.6 through 1.8.0. This is due to the `authenticate_rest_user()` function parsing the `LOGGED_IN_COOKIE` value and authenticating the named user without verifying the cookie's cryptographic signature. The function's intended `/wp-json/shipo/` route restriction can also be bypassed by placing that substring in the query string of an unrelated REST endpoint. This makes it possible for unauthenticated attackers who know an existing username to impersonate that user, including an administrator, and perform authorized actions through the REST API, including creating another administrator account.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-287 - Improper Authentication
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2461 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
shipo Shipo Affected: 1.6 , ≤ 1.8.0 (semver)
guessed Create a notification for this product.
Credits
Nabil Irawan
Show details on NVD website
To clipboard 

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          "vendor": "shipo",
          "versions": [
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              "versionType": "semver"
            }
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      ],
      "credits": [
        {
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          "type": "finder",
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        }
      ],
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          "value": "The Shipo plugin for WordPress is vulnerable to Authentication Bypass in versions 1.6 through 1.8.0. This is due to the `authenticate_rest_user()` function parsing the `LOGGED_IN_COOKIE` value and authenticating the named user without verifying the cookie\u0027s cryptographic signature. The function\u0027s intended `/wp-json/shipo/` route restriction can also be bypassed by placing that substring in the query string of an unrelated REST endpoint. This makes it possible for unauthenticated attackers who know an existing username to impersonate that user, including an administrator, and perform authorized actions through the REST API, including creating another administrator account."
        }
      ],
      "metrics": [
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            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
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      "problemTypes": [
        {
          "descriptions": [
            {
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              "description": "CWE-287 Improper Authentication",
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              "type": "CWE"
            }
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      "providerMetadata": {
        "dateUpdated": "2026-11-14T12:33:23.699Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
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        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/3701532/shipo"
        }
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          "time": "2026-11-14T00:33:13.000Z",
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      "title": "Shipo 1.6 - 1.8.0 - Authentication Bypass to Administrator"
    }
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    "datePublished": "2026-11-14T12:33:23.699Z",
    "dateReserved": "2026-08-14T19:56:29.273Z",
    "dateUpdated": "2026-11-14T12:33:23.699Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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                "versions": [
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                  }
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        "cveTags": [],
        "descriptions": [
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          }
        ],
        "id": "CVE-2026-19907",
        "lastModified": "2026-11-14T13:17:23.250",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
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                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        "sourceIdentifier": "security@wordfence.com",
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              }
            ],
            "source": "security@wordfence.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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