PT-2026-49005 · Apostrophecms · @Apostrophecms/Seo

Published 2026-06-12 · Updated 2026-06-12 · CVE-2026-53608

NVD

CVSS v3.1

8.7

High

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-53608

Affected Products

@Apostrophecms/Seo

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-53608 · Security Note
• https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-wf43-fpp3-cf65 · Note