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CVE-2021-21305

Estado: ModificadaAlta (8.8)—

CarrierWave is an open-source RubyGem which provides a simple and flexible way to upload files from Ruby applications. In CarrierWave before versions 1.3.2 and 2.1.1, there is a code injection vulnerability. The "#manipulate!" method inappropriately evals the content of mutation option(:read/:write), allowing attackers to craft a string that can be executed as a Ruby code. If an application developer supplies untrusted inputs to the option, it will lead to remote code execution(RCE). This is fixed in versions 1.3.2 and 2.1.1.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Carrierwave Project — Carrierwave

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-21305",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 7.4,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
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        "exploitabilityScore": 3.1
      },
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          "scope": "UNCHANGED",
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          "integrityImpact": "HIGH",
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          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
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  "affected": [
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      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "carrierwaveuploader",
          "product": "carrierwave",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.3.2"
            },
            {
              "status": "affected",
              "version": ">= 2.0.0, < 2.1.1"
            }
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        }
      ]
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  ],
  "published": "2021-02-08T20:15:12.527",
  "references": [
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      "url": "https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#132---2021-02-08",
      "tags": [
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    {
      "url": "https://rubygems.org/gems/carrierwave",
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://rubygems.org/gems/carrierwave",
      "tags": [
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        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "CarrierWave is an open-source RubyGem which provides a simple and flexible way to upload files from Ruby applications. In CarrierWave before versions 1.3.2 and 2.1.1, there is a code injection vulnerability. The \"#manipulate!\" method inappropriately evals the content of mutation option(:read/:write), allowing attackers to craft a string that can be executed as a Ruby code. If an application developer supplies untrusted inputs to the option, it will lead to remote code execution(RCE). This is fixed in versions 1.3.2 and 2.1.1."
    },
    {
      "lang": "es",
      "value": "CarrierWave es un RubyGem de código abierto que proporciona una forma simple y flexible de cargar archivos desde aplicaciones de Ruby.&#xa0;En CarrierWave versiones anteriores a 1.3.2 y 2.1.1, se presenta una vulnerabilidad de inyección de código.&#xa0;El método \"#manipulate!\" evalúa inapropiadamente el contenido de la opción de mutación option(:read/:write), lo que permite a atacantes crear una cadena que se pueda ejecutar como código de Ruby.&#xa0;Si un desarrollador de aplicaciones proporciona entradas que no son de confianza para la opción, conllevará a una ejecución de código remota (RCE).&#xa0;Esto se corrigió en las versiones 1.3.2 y 2.1.1"
    }
  ],
  "lastModified": "2026-06-17T03:35:15.433",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:carrierwave_project:carrierwave:*:*:*:*:*:ruby:*:*",
              "vulnerable": true,
              "matchCriteriaId": "68FBD42F-C60B-4C66-B772-C35F4AED519C",
              "versionEndExcluding": "1.3.2"
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          "operator": "OR"
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}