Grav vulnerable to Privilege Escalation in Grav Admin: Missing Username Uniqueness Check Allows Admin Account Takeover_CVE-2025-66296

{
    "lastseen": "",
    "description": "Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a privilege escalation vulnerability exists in Grav\u2019s Admin plugin due to the absence of username uniqueness validation when creating users. A user with the create user permission can create a new account using the same username as an existing administrator account, set a new password/email, and then log in as that administrator. This effectively allows privilege escalation from limited user-manager permissions to full administrator access. This vulnerability is fixed in 1.8.0-beta.27.",
    "published": "2025-12-01T21:03:07.231Z",
    "modified": "2025-12-01T21:03:07.231Z",
    "type": "cve",
    "title": "Grav vulnerable to Privilege Escalation in Grav Admin: Missing Username Uniqueness Check Allows Admin Account Takeover",
    "source": "GitHub_M",
    "references": "https://github.com/getgrav/grav/security/advisories/GHSA-cjcp-qxvg-4rjm\nhttps://github.com/getgrav/grav/commit/3462d94d575064601689b236508c316242e15741",
    "id": "CVE-2025-66296",
    "bulletinFamily": "",
    "cwe": [
        "CWE-266"
    ],
    "cvelist": null,
    "sourceData": "getgrav grav < 1.8.0-beta.27",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "grav",
    "version": "< 1.8.0-beta.27",
    "vendor": "getgrav",
    "ai_description": "Privilege escalation vulnerability in Grav Admin due to missing username uniqueness validation",
    "ai_severity": "High",
    "ai_vendor": "GetGrav",
    "ai_product": "Grav",
    "ai_version": "< 1.8.0-beta.27",
    "ai_score": 8.8
}