DoS in Calls plugin via malformed UTF-8 in WebSocket request_CVE-2025-12689

{
    "lastseen": "",
    "description": "Mattermost versions 11.0.x <= 11.0.4, 10.12.x <= 10.12.2, 10.11.x <= 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request.",
    "published": "2025-12-17T18:14:10.973Z",
    "modified": "2025-12-17T19:29:54.734Z",
    "type": "cve",
    "title": "DoS in Calls plugin via malformed UTF-8 in WebSocket request",
    "source": "Mattermost",
    "references": "https://mattermost.com/security-updates",
    "id": "CVE-2025-12689",
    "bulletinFamily": "",
    "cwe": [
        "CWE-1287"
    ],
    "cvelist": null,
    "sourceData": "Mattermost Mattermost 11.0.0\nMattermost Mattermost 10.12.0\nMattermost Mattermost 10.11.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
        "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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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Mattermost",
    "version": "11.0.0",
    "vendor": "Mattermost",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}