Description

The Yoast SEO – Advanced SEO with real-time guidance and built-in AI plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the the `jsonText` block attribute in all versions up to, and including, 27.1.1 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.

INFO

Published Date :

2026-03-22T03:26:35.127Z

Last Modified :

2026-04-08T17:35:14.548Z

Source :

Wordfence
AFFECTED PRODUCTS

The following products are affected by CVE-2026-3427 vulnerability.

Vendors Products
Wordpress
  • Wordpress
Yoast
  • Yoast Seo – Advanced Seo With Real-time Guidance And Built-in Ai
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-3427.

URL Resource
https://github.com/Yoast/wordpress-seo/pull/23035 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/wordpress-seo/tags/27.0/inc/class-wpseo-utils.php#L915 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/wordpress-seo/tags/27.0/src/generators/schema/howto.php#L125 cve-icon cve-icon
https://plugins.trac.wordpress.org/changeset/3475308/wordpress-seo cve-icon cve-icon
https://www.wordfence.com/threat-intel/vulnerabilities/id/fee1fef5-5716-49e0-a04e-d0dae527fcfc?source=cve cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact