ApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, a project-defined free-form widget style field can carry an editor-controlled quote into an inline style attribute because the wrapper serializer does not apply HTML-attribute encoding. The quote can terminate the style attribute and inject executable attributes when published content, or an affected draft viewed by a higher-privileged user, is rendered. This issue is fixed in version 4.34.0.
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Fixes

Solution

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Workaround

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History

Tue, 20 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 20 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Description ApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, a project-defined free-form widget style field can carry an editor-controlled quote into an inline style attribute because the wrapper serializer does not apply HTML-attribute encoding. The quote can terminate the style attribute and inject executable attributes when published content, or an affected draft viewed by a higher-privileged user, is rendered. This issue is fixed in version 4.34.0.
Title ApostropheCMS: Stored XSS via Unescaped Widget Style Attribute Serialization
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-20T16:59:06.566Z

Reserved: 2026-10-19T21:30:47.246Z

Link: CVE-2026-112958

cve-icon Vulnrichment

Updated: 2026-10-20T16:58:25.295Z

cve-icon NVD

Status : Received

Published: 2026-10-20T17:17:33.190

Modified: 2026-10-20T17:17:33.190

Link: CVE-2026-112958

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses