Lazy Blocks < 4.3.0 - Admin+ Stored XSS via Custom Block Frontend HTML_CVE-2026-8981

{
    "lastseen": "",
    "description": "The Custom Block Builder  WordPress plugin before 4.3.0 does not consistently check the unfiltered_html capability across all paths that write to its block template code fields, allowing administrators on multisite installations (or single-site installs with DISALLOW_UNFILTERED_HTML defined) to inject arbitrary JavaScript that executes for any visitor of pages embedding the affected block.",
    "published": "2026-06-09T06:00:09.486Z",
    "modified": "2026-06-09T10:32:50.766Z",
    "type": "cve",
    "title": "Lazy Blocks < 4.3.0 - Admin+ Stored XSS via Custom Block Frontend HTML",
    "source": "WPScan",
    "references": "https://wpscan.com/vulnerability/9815b0e6-e411-4a5c-9c63-30bad21da698/",
    "id": "CVE-2026-8981",
    "bulletinFamily": "",
    "cwe": [
        "",
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "Unknown Custom Block Builder 0",
    "sourceHref": "",
    "cvss": {
        "score": 3.5,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/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": "Custom Block Builder",
    "version": "0",
    "vendor": "Unknown",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}