FKIE_CVE-2025-66554

Vulnerability from fkie_nvd - Published: 2025-12-05 18:15 - Updated: 2026-10-15 21:10
Severity
3.5 (Low) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Summary
Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were correctly blocked by the content security policy of the Nextcloud Server code. This vulnerability is fixed in 5.5.4, 6.0.6, and 7.2.5.
References
security-advisories@github.comhttps://github.com/nextcloud/contacts/commit/d954d098978dde1f121600e8b994e02f293c68b1Patch
security-advisories@github.comhttps://github.com/nextcloud/contacts/pull/4619Issue Tracking, Patch
security-advisories@github.comhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-9v78-cpfc-v6h2Patch, Vendor Advisory
security-advisories@github.comhttps://hackerone.com/reports/3293290Permissions Required, Vendor Advisory
Impacted products
Vendor Product Version
nextcloud contacts *
nextcloud contacts *
nextcloud contacts *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "security-advisories",
          "vendor": "nextcloud",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 7.0.0-alpha.1, \u003c 7.2.5"
            },
            {
              "status": "affected",
              "version": "\u003e= 6.0.0-alpha1, \u003c 6.0.6"
            },
            {
              "status": "affected",
              "version": "\u003c 5.5.4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nextcloud:contacts:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6A41922A-22BB-43D6-8BA3-7D74D15A3F1D",
              "versionEndExcluding": "5.5.4",
              "versionStartIncluding": "5.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:nextcloud:contacts:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0F4DE317-1CA4-4D75-914D-DF7F1E1A61F1",
              "versionEndExcluding": "6.0.6",
              "versionStartIncluding": "6.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:nextcloud:contacts:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "895F9715-619F-4ACB-B34E-8DF2383BA604",
              "versionEndExcluding": "7.2.5",
              "versionStartIncluding": "7.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were correctly blocked by the content security policy of the Nextcloud Server code. This vulnerability is fixed in 5.5.4, 6.0.6, and 7.2.5."
    },
    {
      "lang": "es",
      "value": "Aplicaci\u00f3n Contacts para Nextcloud sincroniza f\u00e1cilmente contactos desde varios dispositivos con tu Nextcloud y permite la edici\u00f3n. Versiones anteriores a 5.5.4, 6.0.6 y 7.2.5, un usuario malintencionado pudo modificar su campo de organizaci\u00f3n y t\u00edtulo para cargar archivos CSS adicionales. Javascript y otras opciones fueron bloqueadas correctamente por la pol\u00edtica de seguridad del contenido del c\u00f3digo del Servidor Nextcloud. Esta vulnerabilidad est\u00e1 corregida en 5.5.4, 6.0.6 y 7.2.5."
    }
  ],
  "id": "CVE-2025-66554",
  "lastModified": "2026-10-15T21:10:00.327",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.5,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-66554",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-12-08T19:50:53.342639Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-12-05T18:15:58.630",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/nextcloud/contacts/commit/d954d098978dde1f121600e8b994e02f293c68b1"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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        "Patch"
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      "url": "https://github.com/nextcloud/contacts/pull/4619"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9v78-cpfc-v6h2"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Permissions Required",
        "Vendor Advisory"
      ],
      "url": "https://hackerone.com/reports/3293290"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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