CVE-2026-104762
Received Received - Intake

Stored XSS in Kadence Blocks WordPress Plugin

Publication date: 2026-10-10

Last updated on: 2026-10-10

Assigner: Wordfence

Description
The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Block Font Family Attribute in all versions up to, and including, 3.7.12 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This encoding bypass is only triggered when the "Load Google Fonts Locally" site option (kadence_blocks_font_settings['load_fonts_local']) is enabled, which is not the default configuration.

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Meta Information

Published
2026-10-10
Last Modified
2026-10-10
Generated
2026-10-10
AI Q&A
2026-10-10
EPSS Evaluated
N/A
NVD
CVE-2026-104762
EUVD
EUVD-2026-96107

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the Kadence Blocks plugin for WordPress. It allows authenticated attackers with author-level access or higher to inject malicious scripts into web pages via the Block Font Family Attribute. The issue occurs due to insufficient input sanitization and output escaping. The attack is only possible if the 'Load Google Fonts Locally' option is enabled, which is not the default setting.

Detection Guidance

Check WordPress plugins for Kadence Blocks versions up to 3.7.12. Inspect pages for injected scripts via Block Font Family Attribute. Enable the 'Load Google Fonts Locally' option in Kadence settings to verify if it triggers the vulnerability.

Impact Analysis

If exploited, this vulnerability could allow attackers to execute arbitrary web scripts in pages you visit. This could lead to unauthorized actions on your site, data theft, or defacement. Users with author-level access or above pose the greatest risk as they can inject malicious scripts that affect other users.

Compliance Impact

This vulnerability could lead to data breaches or unauthorized access, which may violate GDPR or HIPAA compliance requirements. GDPR mandates protection of user data, while HIPAA requires safeguarding protected health information. Exploitation of this flaw could result in non-compliance penalties and legal consequences.

Mitigation Strategies

Update Kadence Blocks plugin to the latest version beyond 3.7.12. Disable the 'Load Google Fonts Locally' option in Kadence settings. Review and remove any suspicious scripts from pages. Monitor for unauthorized changes.

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