CVE-2026-53608Public exploitNetwork attack vector

Stored XSS via raw analytics identifier interpolation

Published Jun 12, 2026 · Updated Jun 12, 2026

Stored XSS in @apostrophecms/seo 1.4.2 and earlier allows remote authenticated users to execute JavaScript in visitors' browsers. The lib/nodes.js renderer inserts seoGoogleTrackingId and seoGoogleTagManager into raw script bodies through template literals without validation or escaping. Editor-level access, the installed SEO module, enabled seoGoogleAnalytics, and publication of the global document are required; the payload then runs on every page for every visitor.

CVSS severity8.7
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in @apostrophecms/seo 1.4.2 and earlier allows remote authenticated users to execute JavaScript in visitors' browsers. The lib/nodes.js renderer inserts seoGoogleTrackingId and seoGoogleTagManager into raw script bodies through template literals without validation or escaping. Editor-level access, the installed SEO module, enabled seoGoogleAnalytics, and publication of the global document are required; the payload then runs on every page for every visitor.

The record

CVE
CVE-2026-53608
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
Apostrophe Technologies
Product
@apostrophecms/seo
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 1.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Apostrophe Technologies · @apostrophecms/seoversion=<= 1.4.2

Published CVSS scores

8.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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