CVE-2026-9643
No known patch is available for this vulnerability.
The affected plugin has been removed from the WordPress.org directory (reason: Author Request), and no patched version is being distributed through the official directory. If you have the affected software installed, you should uninstall or replace it rather than wait for an update.
Description
The WP Meta SEO plugin for WordPress is vulnerable to Unauthenticated Stored Cross-Site Scripting via the REQUEST_URI server variable in all versions up to, and including, 4.5.18. When the plugin's wpmsTemplateRedirect() hook detects a 404, it concatenates $_SERVER['HTTP_HOST'] with the raw $_SERVER['REQUEST_URI'] and inserts that value verbatim into the wp_wpms_links.link_url column via $wpdb->insert(). This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute whenever an administrator views the plugin's 404 & Redirects admin page (/wp-admin/admin.php?page=metaseo_broken_link).
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1- Range: <=4.5.18
Patches
Vulnerability mechanics
References
6- plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/inc/class.metaseo-broken-link-table.phpnvd
- plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/wp-meta-seo.phpnvd
- plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/wp-meta-seo.phpnvd
- plugins.trac.wordpress.org/changesetnvd
- ti.wordfence.io/vulnerabilities/ca91e41d-b728-4eb0-86d5-043813d8c2c1nvd
- www.wordfence.com/threat-intel/vulnerabilities/id/beceb218-34bf-4571-a07b-939abc7ead8envd
News mentions
1- Wordfence Intelligence Weekly WordPress Vulnerability Report (June 22, 2026 to June 28, 2026)Wordfence Blog · Jul 2, 2026