CVE-2026-3427

MEDIUM EPSS 9.2%
Published Mar 22, 20263mo ago · Modified Jun 17, 20262w ago
6.4 CVSS 3.1
Medium
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Published Mar 22, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
6.4
Exploitability
3.1
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
9.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 5

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.