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CVE-2021-41279

Estado: ModificadaAlta (8.8)—

BaserCMS es un sistema de administración de contenidos de código abierto centrado en el soporte del idioma japonés. En las versiones afectadas, los usuarios con privilegios de carga pueden cargar archivos zip diseñados capaces de salto de ruta en el sistema operativo anfitrión. Se trata de una vulnerabilidad que necesita abordarse cuando el sistema de administración es usado por un número no determinado de usuarios. Si usted es elegible, por favor actualice a la nueva versión tan pronto como sea posible

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)

Basercms — Basercms

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-41279",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 9,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 7.7,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 4,
        "exploitabilityScore": 3.1
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "baserproject",
          "product": "basercms",
          "versions": [
            {
              "status": "affected",
              "version": "< 4.5.3"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-11-26T18:15:07.320",
  "references": [
    {
      "url": "https://github.com/baserproject/basercms/commit/d8ab0a81a7bce35cc95ff7dff851a7e87a084336",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/baserproject/basercms/security/advisories/GHSA-4x2f-54wr-4hjg",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/baserproject/basercms/commit/d8ab0a81a7bce35cc95ff7dff851a7e87a084336",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/baserproject/basercms/security/advisories/GHSA-4x2f-54wr-4hjg",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "BaserCMS is an open source content management system with a focus on Japanese language support. In affected versions users with upload privilege may upload crafted zip files capable of path traversal on the host operating system. This is a vulnerability that needs to be addressed when the management system is used by an unspecified number of users. If you are eligible, please update to the new version as soon as possible."
    },
    {
      "lang": "es",
      "value": "BaserCMS es un sistema de administración de contenidos de código abierto centrado en el soporte del idioma japonés. En las versiones afectadas, los usuarios con privilegios de carga pueden cargar archivos zip diseñados capaces de salto de ruta en el sistema operativo anfitrión. Se trata de una vulnerabilidad que necesita abordarse cuando el sistema de administración es usado por un número no determinado de usuarios. Si usted es elegible, por favor actualice a la nueva versión tan pronto como sea posible"
    }
  ],
  "lastModified": "2026-06-17T04:08:13.880",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "70008390-2A64-4FEC-9502-2045C3643BDC",
              "versionEndExcluding": "4.5.4"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}