Custom Block Builder – Lazy Blocks <= 4.2.0 - Authenticated (Contributor+) Remote Code Execution_CVE-2026-1560

{
    "lastseen": "",
    "description": "The Custom Block Builder \u2013 Lazy Blocks plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 4.2.0 via multiple functions in the 'LazyBlocks_Blocks' class. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute code on the server.",
    "published": "2026-02-11T08:26:27.556Z",
    "modified": "2026-02-11T08:26:27.556Z",
    "type": "cve",
    "title": "Custom Block Builder \u2013 Lazy Blocks <= 4.2.0 - Authenticated (Contributor+) Remote Code Execution",
    "source": "Wordfence",
    "references": "https://www.wordfence.com/threat-intel/vulnerabilities/id/b1853c88-277b-4955-b042-aeed1cffb49b?source=cve\nhttps://plugins.trac.wordpress.org/browser/lazy-blocks/trunk/classes/class-rest.php#L88\nhttps://plugins.trac.wordpress.org/browser/lazy-blocks/trunk/classes/class-blocks.php#L1637\nhttps://plugins.trac.wordpress.org/browser/lazy-blocks/trunk/classes/class-blocks.php#L766\nhttps://plugins.trac.wordpress.org/changeset/3454012/",
    "id": "CVE-2026-1560",
    "bulletinFamily": "",
    "cwe": [
        "CWE-94"
    ],
    "cvelist": null,
    "sourceData": "nko Custom Block Builder \u2013 Lazy Blocks *",
    "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": "Custom Block Builder \u2013 Lazy Blocks",
    "version": "*",
    "vendor": "nko",
    "ai_description": "Remote Code Execution vulnerability in Custom Block Builder \u2013 Lazy Blocks plugin for WordPress via multiple functions in the 'LazyBlocks_Blocks' class",
    "ai_severity": "High",
    "ai_vendor": "nko",
    "ai_product": "Custom Block Builder \u2013 Lazy Blocks",
    "ai_version": "4.2.0",
    "ai_score": 8.8
}