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CVE-2021-33604

Estado: ModificadaBaja (2.5)—

URL encoding error in development mode handler in com.vaadin:flow-server versions 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows local user to execute arbitrary JavaScript code by opening crafted URL in browser.

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 (2)

Vaadin — Flow-serverVaadin — Vaadin

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-33604",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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          "baseScore": 1.2,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:H/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 1.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
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    "cvssMetricV31": [
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        "type": "Secondary",
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 2.5,
          "attackVector": "LOCAL",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 1
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
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          "attackVector": "LOCAL",
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          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
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          "confidentialityImpact": "LOW"
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        "exploitabilityScore": 1
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  "affected": [
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      "affectedData": [
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          "product": "Vaadin",
          "versions": [
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              "lessThan": "unspecified",
              "versionType": "custom"
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              "version": "unspecified",
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              "lessThanOrEqual": "14.6.1"
            },
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              "status": "affected",
              "version": "15.0.0",
              "lessThan": "unspecified",
              "versionType": "custom"
            },
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              "status": "affected",
              "version": "unspecified",
              "versionType": "custom",
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            }
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        {
          "vendor": "Vaadin",
          "product": "flow-server",
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              "status": "affected",
              "version": "2.0.0",
              "lessThan": "unspecified",
              "versionType": "custom"
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            {
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              "version": "unspecified",
              "versionType": "custom",
              "lessThanOrEqual": "2.6.1"
            },
            {
              "status": "affected",
              "version": "3.0.0",
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              "versionType": "custom"
            },
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              "version": "unspecified",
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              "lessThanOrEqual": "6.0.9"
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  "published": "2021-06-24T12:15:08.157",
  "references": [
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      "url": "https://github.com/vaadin/flow/pull/11099",
      "tags": [
        "Patch",
        "Third Party Advisory"
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      "source": "security@vaadin.com"
    },
    {
      "url": "https://vaadin.com/security/cve-2021-33604",
      "tags": [
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      "source": "security@vaadin.com"
    },
    {
      "url": "https://github.com/vaadin/flow/pull/11099",
      "tags": [
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        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://vaadin.com/security/cve-2021-33604",
      "tags": [
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      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "security@vaadin.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-172"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "URL encoding error in development mode handler in com.vaadin:flow-server versions 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows local user to execute arbitrary JavaScript code by opening crafted URL in browser."
    },
    {
      "lang": "es",
      "value": "Un error de codificación de URL en el manejador de modo de desarrollo en com.vaadin:flow-server versiones 2.0.0 hasta 2.6.1 (Vaadin versiones 14.0.0 hasta 14.6.1), versiones 3.0.0 hasta 6.0.9 (Vaadin versiones 15.0.0 hasta 19.0.8) permite a un usuario local  ejecutar código JavaScript arbitrario al abrir una URL diseñada en el navegador"
    }
  ],
  "lastModified": "2026-06-17T03:54:51.847",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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            },
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}