Ghost: Member existence leak via magic link sign-in response_CVE-2026-53947

{
    "lastseen": "",
    "description": "Ghost is a Node.js content management system. From 5.18.0 until 6.21.1, a discrepancy in responses from the members signin endpoints made it possible for an unauthenticated attacker to determine whether a given email address belongs to a registered member of a Ghost site. This vulnerability is fixed in 6.21.1.",
    "published": "2026-06-24T18:07:42.965Z",
    "modified": "2026-06-24T18:07:42.965Z",
    "type": "cve",
    "title": "Ghost: Member existence leak via magic link sign-in response",
    "source": "GitHub_M",
    "references": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-chgm-3698-jm42",
    "id": "CVE-2026-53947",
    "bulletinFamily": "",
    "cwe": [
        "CWE-204"
    ],
    "cvelist": null,
    "sourceData": "TryGhost Ghost >= 5.18.0, < 6.21.1",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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": "Ghost",
    "version": ">= 5.18.0, < 6.21.1",
    "vendor": "TryGhost",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}