FKIE_CVE-2025-66296

Vulnerability from fkie_nvd - Published: 2025-12-01 21:15 - Updated: 2026-09-26 00:10
Severity
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a privilege escalation vulnerability exists in Grav’s Admin plugin due to the absence of username uniqueness validation when creating users. A user with the create user permission can create a new account using the same username as an existing administrator account, set a new password/email, and then log in as that administrator. This effectively allows privilege escalation from limited user-manager permissions to full administrator access. This vulnerability is fixed in 1.8.0-beta.27.
References
security-advisories@github.comhttps://github.com/getgrav/grav/commit/3462d94d575064601689b236508c316242e15741Patch
security-advisories@github.comhttps://github.com/getgrav/grav/security/advisories/GHSA-cjcp-qxvg-4rjmVendor Advisory
Impacted products
Vendor Product Version
getgrav grav *
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
getgrav grav 1.8.0
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a privilege escalation vulnerability exists in Grav\u2019s Admin plugin due to the absence of username uniqueness validation when creating users. A user with the create user permission can create a new account using the same username as an existing administrator account, set a new password/email, and then log in as that administrator. This effectively allows privilege escalation from limited user-manager permissions to full administrator access. This vulnerability is fixed in 1.8.0-beta.27."
    },
    {
      "lang": "es",
      "value": "Grav es una plataforma web basada en archivos. Versiones anteriores a 1.8.0-beta.27, existe una vulnerabilidad de escalada de privilegios en el plugin Admin de Grav debido a la ausencia de validaci\u00f3n de unicidad de nombre de usuario al crear usuarios. Un usuario con el permiso de crear usuarios puede crear una nueva cuenta usando el mismo nombre de usuario que una cuenta de administrador existente, establecer una nueva contrase\u00f1a/correo electr\u00f3nico y luego iniciar sesi\u00f3n como ese administrador. Esto permite efectivamente la escalada de privilegios de permisos limitados de gesti\u00f3n de usuarios a acceso completo de administrador. Esta vulnerabilidad est\u00e1 corregida en 1.8.0-beta.27."
    }
  ],
  "id": "CVE-2025-66296",
  "lastModified": "2026-09-26T00:10:00.127",
  "metrics": {
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      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
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        "ssvcData": {
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          "options": [
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              "exploitation": "poc"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
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          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-12-02T14:05:57.713950Z",
          "version": "2.0.3"
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  "published": "2025-12-01T21:15:53.157",
  "references": [
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      "tags": [
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      "tags": [
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  "vulnStatus": "Analyzed",
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          "lang": "en",
          "value": "CWE-266"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
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}



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