TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes_CVE-2026-47759

{
    "lastseen": "",
    "description": "TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored XSS vulnerability via unsanitized data-mce-* attributes (data-mce-href, data-mce-src, data-mce-style). Allows attackers to inject malicious values that override safe attributes during serialization, bypassing validation. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.",
    "published": "2026-05-28T15:20:11.242Z",
    "modified": "2026-05-28T15:20:11.242Z",
    "type": "cve",
    "title": "TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes",
    "source": "GitHub_M",
    "references": "https://github.com/tinymce/tinymce/security/advisories/GHSA-q742-qvgc-gc2f\nhttps://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview\nhttps://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview",
    "id": "CVE-2026-47759",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "tinymce tinymce < 5.11.1\ntinymce tinymce >= 6.0.0, <= 6.8.6\ntinymce tinymce >= 7.0.0, < 7.9.3\ntinymce tinymce >= 8.0.0, < 8.5.1",
    "sourceHref": "",
    "cvss": {
        "score": 8.7,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/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": "tinymce",
    "version": "< 5.11.1",
    "vendor": "tinymce",
    "ai_description": "Stored XSS vulnerability via unsanitized data-mce-* attributes",
    "ai_severity": "High",
    "ai_vendor": "TinyMCE",
    "ai_product": "TinyMCE",
    "ai_version": "< 5.11.1, < 7.9.3, < 8.5.1",
    "ai_score": 8.7
}