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CVE-2020-8155

Estado: ModificadaMedia (5.4)—

An outdated 3rd party library in the Files PDF viewer for Nextcloud Server 18.0.2 caused a Cross-site scripting vulnerability when opening a malicious PDF.

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)

Nextcloud — Nextcloud Server

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-8155",
  "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": [
      {
        "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": "support@hackerone.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "Nextcloud Server",
          "versions": [
            {
              "status": "affected",
              "version": "18.0.3"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-05-12T13:15:13.127",
  "references": [
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00037.html",
      "source": "support@hackerone.com"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00038.html",
      "source": "support@hackerone.com"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00040.html",
      "source": "support@hackerone.com"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00019.html",
      "source": "support@hackerone.com"
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/",
      "source": "support@hackerone.com"
    },
    {
      "url": "https://nextcloud.com/security/advisory/?id=NC-SA-2020-019",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "support@hackerone.com"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00037.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00038.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00040.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00019.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://nextcloud.com/security/advisory/?id=NC-SA-2020-019",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "support@hackerone.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An outdated 3rd party library in the Files PDF viewer for Nextcloud Server 18.0.2 caused a Cross-site scripting vulnerability when opening a malicious PDF."
    },
    {
      "lang": "es",
      "value": "Una biblioteca de terceros obsoleta en el visualizador de Archivos PDF para Nextcloud Server versión 18.0.2, causó una vulnerabilidad de tipo Cross-site scripting cuando se abre un PDF malicioso."
    }
  ],
  "lastModified": "2026-06-17T03:25:57.333",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C2185060-0889-42F3-9437-92F358D3DE45",
              "versionEndExcluding": "18.0.3"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "support@hackerone.com"
}