{
    "id": "CVE-2018-20148",
    "published": "2018-12-14 20:29:00",
    "last_modified": "2026-06-17 01:52:20",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-502",
    "description": "In WordPress before 4.9.9 and 5.x before 5.0.1, contributors could conduct PHP object injection attacks via crafted metadata in a wp.getMediaItem XMLRPC call. This is caused by mishandling of serialized data at phar:// URLs in the wp_get_attachment_thumb_file function in wp-includes/post.php.",
    "epss_score": "0.26819",
    "epss_percentile": "0.97979",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-03 18:17:21",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 26.8% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "wordpress",
            "product": "wordpress"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://www.securityfocus.com/bid/106220",
        "https://blog.secarma.co.uk/labs/near-phar-dangerous-unserialization-wherever-you-are",
        "https://codex.wordpress.org/Version_4.9.9",
        "https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html",
        "https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/",
        "https://wordpress.org/support/wordpress-version/version-5-0-1/",
        "https://wpvulndb.com/vulnerabilities/9171",
        "https://www.debian.org/security/2019/dsa-4401",
        "https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/",
        "https://www.zdnet.com/article/wordpress-vulnerability-affects-a-third-of-most-popular-websites-online/",
        "http://www.securityfocus.com/bid/106220",
        "https://blog.secarma.co.uk/labs/near-phar-dangerous-unserialization-wherever-you-are",
        "https://codex.wordpress.org/Version_4.9.9",
        "https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html",
        "https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/",
        "https://wordpress.org/support/wordpress-version/version-5-0-1/",
        "https://wpvulndb.com/vulnerabilities/9171",
        "https://www.debian.org/security/2019/dsa-4401",
        "https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/",
        "https://www.zdnet.com/article/wordpress-vulnerability-affects-a-third-of-most-popular-websites-online/"
    ]
}