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CVE-2021-20799

Estado: ModificadaMedia (5.4)—

Cross-site scripting vulnerability in the management screen of Cybozu Remote Service 3.1.8 to 3.1.9 allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors.

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)

Cybozu — Remote Service Manager

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-20799",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 3.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.4,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.3
      }
    ]
  },
  "affected": [
    {
      "source": "vultures@jpcert.or.jp",
      "affectedData": [
        {
          "vendor": "Cybozu, Inc.",
          "product": "Cybozu Remote Service",
          "versions": [
            {
              "status": "affected",
              "version": "3.1.8 to 3.1.9"
            }
          ]
        }
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    }
  ],
  "published": "2021-10-13T09:15:07.887",
  "references": [
    {
      "url": "https://jvn.jp/en/jp/JVN52694228/index.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://kb.cybozu.support/article/37425",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://jvn.jp/en/jp/JVN52694228/index.html",
      "tags": [
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      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://kb.cybozu.support/article/37425",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cross-site scripting vulnerability in the management screen of Cybozu Remote Service 3.1.8 to 3.1.9 allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de tipo cross-site scripting en la pantalla de administración de Cybozu Remote Service versiones 3.1.8 hasta 3.1.9, permite a un atacante remoto autenticado inyectar un script arbitrario por vectores no especificados"
    }
  ],
  "lastModified": "2026-06-17T03:34:28.270",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:cybozu:remote_service_manager:3.1.8:*:*:*:*:*:*:*",
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            },
            {
              "criteria": "cpe:2.3:a:cybozu:remote_service_manager:3.1.9:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2DEC9D57-563E-4C78-83C3-967ACED941CD"
            }
          ],
          "operator": "OR"
        }
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  ],
  "sourceIdentifier": "vultures@jpcert.or.jp"
}