Mattermost Shared Channel Upload Type Validation Bypass_CVE-2025-49222

{
    "lastseen": "",
    "description": "Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2, 10.10.x <= 10.10.0 fail to validate upload types in remote cluster upload sessions which allows a system admin to upload non-attachment file types via shared channels that could potentially be placed in arbitrary filesystem directories.",
    "published": "2025-08-21T07:59:45.057Z",
    "modified": "2025-08-21T07:59:45.057Z",
    "type": "cve",
    "title": "Mattermost Shared Channel Upload Type Validation Bypass",
    "source": "Mattermost",
    "references": "https://mattermost.com/security-updates",
    "id": "CVE-2025-49222",
    "bulletinFamily": "",
    "cwe": [
        "CWE-434"
    ],
    "cvelist": null,
    "sourceData": "Mattermost Mattermost 10.8.0\nMattermost Mattermost 10.5.0\nMattermost Mattermost 9.11.0\nMattermost Mattermost 10.9.0\nMattermost Mattermost 10.10.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.8,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/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": "Mattermost",
    "version": "10.8.0",
    "vendor": "Mattermost",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}