Nextcloud Calendar app allowed booking appointments without the generated token_CVE-2025-66546

{
    "lastseen": "",
    "description": "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.",
    "published": "2025-12-05T16:49:46.553Z",
    "modified": "2025-12-05T18:32:44.271Z",
    "type": "cve",
    "title": "Nextcloud Calendar app allowed booking appointments without the generated token",
    "source": "GitHub_M",
    "references": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7x2j-2674-fj95\nhttps://github.com/nextcloud/calendar/pull/7537\nhttps://github.com/nextcloud/calendar/commit/f41650c3681fc4a4130eb883f5c0899c011326b3\nhttps://hackerone.com/reports/3275810",
    "id": "CVE-2025-66546",
    "bulletinFamily": "",
    "cwe": [
        "CWE-639"
    ],
    "cvelist": null,
    "sourceData": "nextcloud security-advisories >= 6.0.0-rc.1, < 6.0.1\nnextcloud security-advisories >= 5.0.0-rc.1, < 5.5.6\nnextcloud security-advisories >= 3.0.0-beta1, < 4.7.19",
    "sourceHref": "",
    "cvss": {
        "score": 3.3,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "security-advisories",
    "version": ">= 6.0.0-rc.1, < 6.0.1",
    "vendor": "nextcloud",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}