@apostrophecms/seo Vulnerable to Stored XSS via Unsanitized Google Analytics / GTM ID Injected into Script Tag_CVE-2026-53608

{
    "lastseen": "",
    "description": "ApostropheCMS is an open-source Node.js content management system. Versions up to and including 1.4.2 of the `@apostrophecms/seo` package injects the Google Analytics Tracking ID (`seoGoogleTrackingId`) and Google Tag Manager ID (`seoGoogleTagManager`) directly into `<script>` tag bodies using JavaScript template literals without any sanitization or validation. Any user with editor-level access (the default role for content managers) can set these fields to a malicious value, resulting in stored XSS that executes on every page for every visitor of the site. As of time of publication, no known patched versions are available.",
    "published": "2026-06-12T20:57:48.913Z",
    "modified": "2026-06-12T20:57:48.913Z",
    "type": "cve",
    "title": "@apostrophecms/seo Vulnerable to Stored XSS via Unsanitized Google Analytics / GTM ID Injected into Script Tag",
    "source": "GitHub_M",
    "references": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-wf43-fpp3-cf65",
    "id": "CVE-2026-53608",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "apostrophecms @apostrophecms/seo <= 1.4.2",
    "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": "@apostrophecms/seo",
    "version": "<= 1.4.2",
    "vendor": "apostrophecms",
    "ai_description": "Stored XSS vulnerability in @apostrophecms/seo package due to unsanitized Google Analytics and Google Tag Manager IDs",
    "ai_severity": "High",
    "ai_vendor": "ApostropheCMS",
    "ai_product": "@apostrophecms/seo",
    "ai_version": "<= 1.4.2",
    "ai_score": 8.7
}