GutenBee <= 2.20.1 - Authenticated (Author+) Arbitrary File Upload via wp_check_filetype_and_ext Filter_CVE-2026-9227

{
    "lastseen": "",
    "description": "The GutenBee \u2013 Gutenberg Blocks plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.20.1 via the gutenbee_file_and_ext_json function. This is due to a flawed strpos() substring check that only verifies whether the filename contains the string '.json' rather than confirming the filename ends with a .json extension, allowing double-extension filenames like shell.json.php to bypass validation. This makes it possible for authenticated attackers, with author-level access and above, to upload files that may be executable, which makes remote code execution possible.",
    "published": "2026-05-28T06:45:39.874Z",
    "modified": "2026-05-28T06:45:39.874Z",
    "type": "cve",
    "title": "GutenBee <= 2.20.1 - Authenticated (Author+) Arbitrary File Upload via wp_check_filetype_and_ext Filter",
    "source": "Wordfence",
    "references": "https://www.wordfence.com/threat-intel/vulnerabilities/id/2d20e8c9-975d-4e8c-8bea-50935853c7d4?source=cve\nhttps://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.1/gutenbee.php#L571\nhttps://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.1/gutenbee.php#L570\nhttps://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.1/gutenbee.php#L579\nhttps://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.0/gutenbee.php#L571\nhttps://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.0/gutenbee.php#L570\nhttps://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.0/gutenbee.php#L579\nhttps://github.com/cssigniter/gutenbee/commit/bde934cdecf67a4de1d6548cc1fc6c59bc6690e5\nhttps://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3543574%40gutenbee&new=3543574%40gutenbee&sfp_email=&sfph_mail=",
    "id": "CVE-2026-9227",
    "bulletinFamily": "",
    "cwe": [
        "CWE-434"
    ],
    "cvelist": null,
    "sourceData": "cssigniterteam GutenBee \u2013 Gutenberg Blocks 0",
    "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": "GutenBee \u2013 Gutenberg Blocks",
    "version": "2.20.1",
    "vendor": "cssigniterteam",
    "ai_description": "Arbitrary File Upload vulnerability in GutenBee \u2013 Gutenberg Blocks plugin for WordPress, allowing authenticated attackers to upload executable files and enabling remote code execution.",
    "ai_severity": "High",
    "ai_vendor": "cssigniter",
    "ai_product": "GutenBee \u2013 Gutenberg Blocks",
    "ai_version": "2.20.1",
    "ai_score": 8.8
}