CVE-2026-3604 | THREATINT

Description

The WP SEO Structured Data Schema plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `_kcseo_ative_tab` parameter in all versions up to, and including, 2.8.1 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.

PUBLISHED Reserved 2026-03-05 | Published 2026-05-12 | Updated 2026-05-12 | Assigner Wordfence

MEDIUM: 4.9CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N