Nextcloud: Unauthorized force-mute from missing permission check when using internal signaling_CVE-2026-45266

{
    "lastseen": "",
    "description": "Nextcloud is an open source content collaboration platform. Prior to versions 21.1.10, 22.0.11, and 23.0.3, a low-privileged user can force other user's microphones to be muted in calls when no High-performance Backend is installed. This issue has been patched in versions 21.1.10, 22.0.11, and 23.0.3.",
    "published": "2026-06-01T16:39:56.879Z",
    "modified": "2026-06-01T16:39:56.879Z",
    "type": "cve",
    "title": "Nextcloud: Unauthorized force-mute from missing permission check when using internal signaling",
    "source": "GitHub_M",
    "references": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x75r-65hm-cw35\nhttps://github.com/nextcloud/spreed/pull/17577\nhttps://hackerone.com/reports/3636758",
    "id": "CVE-2026-45266",
    "bulletinFamily": "",
    "cwe": [
        "CWE-284"
    ],
    "cvelist": null,
    "sourceData": "nextcloud security-advisories < 21.1.10\nnextcloud security-advisories < 22.0.11\nnextcloud security-advisories < 23.0.3",
    "sourceHref": "",
    "cvss": {
        "score": 3.5,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "security-advisories",
    "version": "< 21.1.10",
    "vendor": "nextcloud",
    "ai_description": "",
    "ai_severity": "",
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    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}