CVE-2026-53608: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in apostrophecms @apostrophecms/seo
ApostropheCMS versions up to and including 1.4.2 of the @apostrophecms/seo package contain a stored cross-site scripting (XSS) vulnerability. This occurs because the Google Analytics Tracking ID and Google Tag Manager ID are injected directly into script tags without sanitization. Users with editor-level access can exploit this by inserting malicious scripts that execute for every site visitor. No patched versions are currently available.
AI Analysis
Technical Summary
The @apostrophecms/seo package in ApostropheCMS up to version 1.4.2 improperly neutralizes input when embedding Google Analytics and Tag Manager IDs into script tag bodies using JavaScript template literals without sanitization or validation. This allows any user with editor-level privileges to inject malicious JavaScript code, resulting in stored cross-site scripting (CWE-79) that executes on every page load for all visitors. The vulnerability has a CVSS 3.1 score of 8.7, indicating high severity. As of the publication date, no official fix or patch has been released.
Potential Impact
Successful exploitation allows an attacker with editor-level access to execute arbitrary JavaScript in the context of every visitor's browser on the affected site. This can lead to theft of sensitive information, session hijacking, or other malicious actions impacting confidentiality and integrity. Availability is not affected. The vulnerability affects all visitors to the site, amplifying its impact.
Mitigation Recommendations
No official patch or fix is currently available for this vulnerability. Users should restrict editor-level access to trusted individuals only and consider removing or disabling the use of the vulnerable @apostrophecms/seo package until a fix is released. Monitor the vendor's advisory channels for updates regarding remediation.
CVE-2026-53608: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in apostrophecms @apostrophecms/seo
Description
ApostropheCMS versions up to and including 1.4.2 of the @apostrophecms/seo package contain a stored cross-site scripting (XSS) vulnerability. This occurs because the Google Analytics Tracking ID and Google Tag Manager ID are injected directly into script tags without sanitization. Users with editor-level access can exploit this by inserting malicious scripts that execute for every site visitor. No patched versions are currently available.
CVSS v3.1
Score 8.7high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The @apostrophecms/seo package in ApostropheCMS up to version 1.4.2 improperly neutralizes input when embedding Google Analytics and Tag Manager IDs into script tag bodies using JavaScript template literals without sanitization or validation. This allows any user with editor-level privileges to inject malicious JavaScript code, resulting in stored cross-site scripting (CWE-79) that executes on every page load for all visitors. The vulnerability has a CVSS 3.1 score of 8.7, indicating high severity. As of the publication date, no official fix or patch has been released.
Potential Impact
Successful exploitation allows an attacker with editor-level access to execute arbitrary JavaScript in the context of every visitor's browser on the affected site. This can lead to theft of sensitive information, session hijacking, or other malicious actions impacting confidentiality and integrity. Availability is not affected. The vulnerability affects all visitors to the site, amplifying its impact.
Mitigation Recommendations
No official patch or fix is currently available for this vulnerability. Users should restrict editor-level access to trusted individuals only and consider removing or disabling the use of the vulnerable @apostrophecms/seo package until a fix is released. Monitor the vendor's advisory channels for updates regarding remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-09T19:39:52.404Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2c7c93e617e2d834c6c823
Added to database: 6/12/2026, 9:39:31 PM
Last enriched: 6/12/2026, 9:54:23 PM
Last updated: 6/12/2026, 10:49:32 PM
Views: 7
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