CVE-2026-15425

Summary

The Yoast SEO – Advanced SEO with real-time guidance and built-in AI plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Post Slug (post_name) in all versions up to, and including, 28.0 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 requires pretty permalinks to be enabled, as the exploit chain depends on get_permalink() embedding the stored percent-encoded post_name in the generated URL.

Affected Software

Weaknesses

• CWE-79: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References

• https://www.wordfence.com/threat-intel/vulnerabilities/id/4b2fa1b7-a5af-4ea6-9bee-19a6cdfd7701?source=cve
• https://plugins.trac.wordpress.org/browser/wordpress-seo/tags/28.0/admin/class-bulk-editor-list-table.php#L900
• https://plugins.trac.wordpress.org/browser/wordpress-seo/tags/28.0/admin/class-bulk-editor-list-table.php#L898
• https://plugins.trac.wordpress.org/browser/wordpress-seo/tags/27.6/admin/class-bulk-editor-list-table.php#L900
• https://plugins.trac.wordpress.org/browser/wordpress-seo/tags/27.6/admin/class-bulk-editor-list-table.php#L898
• https://plugins.trac.wordpress.org/changeset/3598937/wordpress-seo/trunk/admin/class-bulk-editor-list-table.php
• https://plugins.trac.wordpress.org/changeset?old_path=%2Fwordpress-seo/tags/28.0&new_path=%2Fwordpress-seo/tags/28.1

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