FKIE_CVE-2025-66514

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
Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. Prior to 5.5.3, a stored HTML injection in the Mail app's message list allowed an authenticated user to inject HTML into the email subjects. Javascript was correctly blocked by the content security policy of the Nextcloud Server code.
References
security-advisories@github.comhttps://github.com/nextcloud/mail/commit/c64fcc3b79e0c089b5e1d2e04a07bfa740b2ac09Patch
security-advisories@github.comhttps://github.com/nextcloud/mail/pull/11740Issue Tracking, Patch
security-advisories@github.comhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-v394-8gpc-6fv5Patch, Vendor Advisory
security-advisories@github.comhttps://hackerone.com/reports/3357036Permissions Required, Vendor Advisory
Impacted products
Vendor Product Version
nextcloud mail *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "security-advisories",
          "vendor": "nextcloud",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.2.0-beta.1, \u003c 5.5.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nextcloud:mail:*:*:*:*:*:nextcloud:*:*",
              "matchCriteriaId": "08B65EA3-F8F3-4B61-97BE-F593AE32C628",
              "versionEndExcluding": "5.5.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. Prior to 5.5.3, a stored HTML injection in the Mail app\u0027s message list allowed an authenticated user to inject HTML into the email subjects. Javascript was correctly blocked by the content security policy of the Nextcloud Server code."
    },
    {
      "lang": "es",
      "value": "Nextcloud Mail es la aplicaci\u00f3n de correo para Nextcloud, una plataforma de productividad auto?alojada. Versiones anteriores a 5.5.3, una inyecci\u00f3n HTML almacenada en la lista de mensajes de la aplicaci\u00f3n Mail permit\u00eda a un usuario autenticado inyectar HTML en los asuntos de los correos electr\u00f3nicos. Javascript fue bloqueado correctamente por la pol\u00edtica de seguridad de contenido del c\u00f3digo del Servidor Nextcloud."
    }
  ],
  "id": "CVE-2025-66514",
  "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-2025-66514",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-12-08T20:10:07.643433Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-12-05T18:15:57.457",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/nextcloud/mail/commit/c64fcc3b79e0c089b5e1d2e04a07bfa740b2ac09"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/nextcloud/mail/pull/11740"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v394-8gpc-6fv5"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Permissions Required",
        "Vendor Advisory"
      ],
      "url": "https://hackerone.com/reports/3357036"
    }
  ],
  "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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