Nextcloud Server users can modify tags on files that do not belong to them_CVE-2025-66547

{
    "lastseen": "",
    "description": "Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Enterprise Server prior to 31.0.1, non-privileged users can modify tags on files they should not have access to via bulk tagging. This vulnerability is fixed in 31.0.1.",
    "published": "2025-12-05T16:32:17.359Z",
    "modified": "2025-12-05T18:20:43.503Z",
    "type": "cve",
    "title": "Nextcloud Server users can modify tags on files that do not belong to them",
    "source": "GitHub_M",
    "references": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2\nhttps://github.com/nextcloud/server/issues/51247\nhttps://github.com/nextcloud/server/pull/51288\nhttps://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9\nhttps://hackerone.com/reports/3040887",
    "id": "CVE-2025-66547",
    "bulletinFamily": "",
    "cwe": [
        "CWE-639"
    ],
    "cvelist": null,
    "sourceData": "nextcloud security-advisories < 31.0.1",
    "sourceHref": "",
    "cvss": {
        "score": 4.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "security-advisories",
    "version": "< 31.0.1",
    "vendor": "nextcloud",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}