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CVE-2018-3763

Estado: ModificadaMedia (4.8)—

In Nextcloud Calendar before 1.5.8 and 1.6.1, a missing sanitization of search results for an autocomplete field could lead to a stored XSS requiring user-interaction. The missing sanitization only affected group names, hence malicious search results could only be crafted by privileged users like admins or group admins.

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 — Calendar

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-3763",
  "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": 4.8,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 1.7
      }
    ]
  },
  "affected": [
    {
      "source": "support@hackerone.com",
      "affectedData": [
        {
          "vendor": "Nextcloud",
          "product": "Nextcloud Calendar application",
          "versions": [
            {
              "status": "affected",
              "version": "<1.6.1, <1.5.8"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-07-05T16:29:00.517",
  "references": [
    {
      "url": "https://nextcloud.com/security/advisory/?id=nc-sa-2018-004",
      "tags": [
        "Broken Link",
        "Vendor Advisory"
      ],
      "source": "support@hackerone.com"
    },
    {
      "url": "https://nextcloud.com/security/advisory/?id=nc-sa-2018-004",
      "tags": [
        "Broken Link",
        "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": "In Nextcloud Calendar before 1.5.8 and 1.6.1, a missing sanitization of search results for an autocomplete field could lead to a stored XSS requiring user-interaction. The missing sanitization only affected group names, hence malicious search results could only be crafted by privileged users like admins or group admins."
    },
    {
      "lang": "es",
      "value": "En Nextcloud Calendar en versiones anteriores a la 1.5.8 y la 1.6.1, la falta de saneamiento de los resultados de búsqueda de un campo de autocompletar podría conducir a Cross-Site Scripting (XSS) persistente que requiere interacción del usuario. La falta de saneamiento solo afectó a los nombres de grupo, por lo que los resultados de búsqueda maliciosos solo podrían ser manipulados por usuarios privilegiados como los administradores o los administradores de grupo."
    }
  ],
  "lastModified": "2026-06-17T01:57:47.420",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nextcloud:calendar:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F8375E28-4CB6-49E1-BB02-BE9D86808519",
              "versionEndExcluding": "1.5.8"
            },
            {
              "criteria": "cpe:2.3:a:nextcloud:calendar:1.6.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FDF3942E-47CB-42BA-8869-61F334F289EA"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "support@hackerone.com"
}