CVE-2026-105890
Received Received - Intake

Stored XSS in Gutenberg Blocks by Kadence Blocks

Publication date: 2026-10-08

Last updated on: 2026-10-08

Assigner: Patchstack

Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Liquid Web / StellarWP Gutenberg Blocks by Kadence Blocks kadence-blocks allows Stored XSS.This issue affects Gutenberg Blocks by Kadence Blocks: from n/a through 3.7.12.

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Meta Information

Published
2026-10-08
Last Modified
2026-10-08
Generated
2026-10-08
AI Q&A
2026-10-08
EPSS Evaluated
N/A
NVD
CVE-2026-105890
EUVD
EUVD-2026-94949

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Liquid Web / StellarWP Gutenberg Blocks by Kadence Blocks 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 is a Stored Cross-Site Scripting (XSS) vulnerability in the Gutenberg Blocks by Kadence Blocks plugin. It allows attackers to inject malicious scripts into web pages that are stored on the server and executed when other users view those pages.

Detection Guidance

To detect this vulnerability, inspect your WordPress installation for the presence of Gutenberg Blocks by Kadence Blocks plugin versions up to 3.7.12. Check for unusual JavaScript execution or stored inputs in web pages. Use security plugins to scan for XSS vulnerabilities or review server logs for suspicious activity.

Impact Analysis

An attacker could exploit this to steal user sessions, deface websites, or redirect users to malicious sites. Users with access to the vulnerable plugin could inject scripts that execute when other users view affected pages.

Compliance Impact

This vulnerability could lead to data breaches, compromising personal or sensitive data. This may violate GDPR (data protection) and HIPAA (health information privacy) requirements, potentially resulting in legal penalties and reputational damage.

Mitigation Strategies

Immediately update the Gutenberg Blocks by Kadence Blocks plugin to the latest version beyond 3.7.12. If an update is unavailable, consider disabling the plugin temporarily. Implement input validation and output encoding in your web application to prevent XSS attacks.

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