PT-2026-51700 · Joomunited · Wp Meta Seo

Melquisedeq Ortiz · Published 2026-06-24 · Updated 2026-06-24 · CVE-2026-9643

NVD

CVSS v3.1

7.2

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

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).

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-9643

Affected Products

Wp Meta Seo

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-9643 · Security Note
• https://wordfence.com/threat-intel/vulnerabilities/id/beceb218-34bf-4571-a07b-939abc7ead8e?source=cve · Note
• https://ti.wordfence.io/vulnerabilities/ca91e41d-b728-4eb0-86d5-043813d8c2c1 · Note
• https://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/wp-meta-seo.php#L1171 · Note
• https://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/inc/class.metaseo-broken-link-table.php#L894 · Note
• https://plugins.trac.wordpress.org/browser/wp-meta-seo/tags/4.5.18/wp-meta-seo.php#L1135 · Note
• https://plugins.trac.wordpress.org/changeset?old_path=/wp-meta-seo/tags/4.5.12&new_path=/wp-meta-seo/tags/4.5.13 · Note