fkie_cve-2025-66546
Vulnerability from fkie_nvd
Published
2025-12-05 17:16
Modified
2025-12-05 17:16
Severity ?
3.3 (Low) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Summary
Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.19, 5.5.6, and 6.0.1, the calendar app allowed blindly booking appointments with a squential ID without known the appointment token. This vulnerability is fixed in 4.7.19, 5.5.6, and 6.0.1.
References
security-advisories@github.comhttps://github.com/nextcloud/calendar/commit/f41650c3681fc4a4130eb883f5c0899c011326b3
security-advisories@github.comhttps://github.com/nextcloud/calendar/pull/7537
security-advisories@github.comhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-7x2j-2674-fj95
security-advisories@github.comhttps://hackerone.com/reports/3275810
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.19, 5.5.6, and 6.0.1, the calendar app allowed blindly booking appointments with a squential ID without known the appointment token. This vulnerability is fixed in 4.7.19, 5.5.6, and 6.0.1."
    }
  ],
  "id": "CVE-2025-66546",
  "lastModified": "2025-12-05T17:16:05.163",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 3.3,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-12-05T17:16:05.163",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nextcloud/calendar/commit/f41650c3681fc4a4130eb883f5c0899c011326b3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nextcloud/calendar/pull/7537"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7x2j-2674-fj95"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://hackerone.com/reports/3275810"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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