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CVE-2021-21307

Estado: ModificadaCrítica (9.8)—

Lucee Server is a dynamic, Java based (JSR-223), tag and scripting language used for rapid web application development. In Lucee Admin before versions 5.3.7.47, 5.3.6.68 or 5.3.5.96 there is an unauthenticated remote code exploit. This is fixed in versions 5.3.7.47, 5.3.6.68 or 5.3.5.96. As a workaround, one can block access to the Lucee Administrator.

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)

Lucee — Lucee Server

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-21307",
  "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": 8.6,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
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  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
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          "product": "Lucee",
          "versions": [
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            },
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              "version": ">= 5.3.6.0, < 5.3.6.68"
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              "version": ">= 5.3.7.0, < 5.3.7.47"
            }
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  ],
  "published": "2021-02-11T19:15:13.313",
  "references": [
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      "url": "http://ciacfug.org/blog/updating-lucee-as-part-of-a-vulnerability-alert-response",
      "tags": [
        "Patch",
        "Third Party Advisory"
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      "source": "security-advisories@github.com"
    },
    {
      "url": "http://packetstormsecurity.com/files/163864/Lucee-Administrator-imgProcess.cfm-Arbitrary-File-Write.html",
      "tags": [
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      "url": "https://dev.lucee.org/t/lucee-vulnerability-alert-november-2020/7643",
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    },
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      "tags": [
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    },
    {
      "url": "https://github.com/lucee/Lucee/commit/6208ab7c44c61d26c79e0b0af10382899f57e1ca",
      "tags": [
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      "source": "security-advisories@github.com"
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    {
      "url": "https://github.com/lucee/Lucee/security/advisories/GHSA-2xvv-723c-8p7r",
      "tags": [
        "Product"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://portswigger.net/daily-swig/security-researchers-earn-50k-after-exposing-critical-flaw-in-apple-travel-portal",
      "tags": [
        "Press/Media Coverage",
        "Third Party Advisory"
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      "source": "security-advisories@github.com"
    },
    {
      "url": "http://ciacfug.org/blog/updating-lucee-as-part-of-a-vulnerability-alert-response",
      "tags": [
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        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://packetstormsecurity.com/files/163864/Lucee-Administrator-imgProcess.cfm-Arbitrary-File-Write.html",
      "tags": [
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        "VDB Entry"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://dev.lucee.org/t/lucee-vulnerability-alert-november-2020/7643",
      "tags": [
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    },
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      "tags": [
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        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/lucee/Lucee/commit/6208ab7c44c61d26c79e0b0af10382899f57e1ca",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/lucee/Lucee/security/advisories/GHSA-2xvv-723c-8p7r",
      "tags": [
        "Product"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://portswigger.net/daily-swig/security-researchers-earn-50k-after-exposing-critical-flaw-in-apple-travel-portal",
      "tags": [
        "Press/Media Coverage",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Lucee Server is a dynamic, Java based (JSR-223), tag and scripting language used for rapid web application development. In Lucee Admin before versions 5.3.7.47, 5.3.6.68 or 5.3.5.96 there is an unauthenticated remote code exploit. This is fixed in versions 5.3.7.47, 5.3.6.68 or 5.3.5.96. As a workaround, one can block access to the Lucee Administrator."
    },
    {
      "lang": "es",
      "value": "Lucee Server es un lenguaje dinámico, de etiquetado y scripting de comandos basado en Java (JSR-223) que es utilizado para el desarrollo rápido de aplicaciones web.&#xa0;En Lucee Admin anterior a versiones 5.3.7.47, 5.3.6.68 o 5.3.5.96 se presenta una explotación de código remota no autenticada.&#xa0;Esto es corregido en las versiones 5.3.7.47, 5.3.6.68 o 5.3.5.96.&#xa0;Como solución alternativa, se puede bloquear el acceso a Lucee Administrator"
    }
  ],
  "lastModified": "2026-06-17T03:35:15.687",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:lucee:lucee_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F63963E7-D380-493F-B75B-4FBCDD646D97",
              "versionEndExcluding": "5.3.5.96",
              "versionStartIncluding": "5.3.5.00"
            },
            {
              "criteria": "cpe:2.3:a:lucee:lucee_server:*:*:*:*:*:*:*:*",
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            },
            {
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              "matchCriteriaId": "9ED241BC-C6BA-4DBC-BD08-3FC8A529350E",
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            }
          ],
          "operator": "OR"
        }
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    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}