CVE-2026-18435
Received Received - Intake

Stored XSS in Kadence Blocks WordPress Plugin

Publication date: 2026-08-01

Last updated on: 2026-08-01

Assigner: Wordfence

Description
The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'toggleIcon' Block Attribute in all versions up to, and including, 3.7.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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Meta Information

Published
2026-08-01
Last Modified
2026-08-01
Generated
2026-08-01
AI Q&A
2026-08-01
EPSS Evaluated
N/A
NVD
CVE-2026-18435
EUVD
EUVD-2026-51748

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
kadence_blocks kadence_blocks to 3.7.8 (inc)

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) issue in the Kadence Blocks plugin for WordPress. It allows authenticated attackers with contributor-level access or higher to inject malicious scripts into web pages via the 'toggleIcon' block attribute. The flaw exists due to insufficient input sanitization and output escaping in versions up to and including 3.7.8.

Detection Guidance

This vulnerability requires checking WordPress installations for the Kadence Blocks plugin versions up to 3.7.8. Inspect plugin files for the 'toggleIcon' block attribute in pages or posts. No specific commands are provided in the context.

Impact Analysis

If exploited, this vulnerability could allow attackers to inject arbitrary web scripts into pages. When users access these pages, the injected scripts execute, potentially stealing user data, session cookies, or performing actions on behalf of the user. This could lead to unauthorized access, data breaches, or defacement of the website.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR and HIPAA by exposing sensitive user data. GDPR requires protection against unauthorized data processing, while HIPAA mandates safeguards for protected health information. A successful XSS attack may result in data breaches, triggering regulatory fines and legal consequences.

Mitigation Strategies

Update the Kadence Blocks plugin to the latest version beyond 3.7.8. Remove or disable the plugin if updates are unavailable. Restrict contributor-level access to prevent unauthorized script injection.

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