CVE-2026-3604
Stored XSS in WP SEO Structured Data Schema WordPress Plugin
Publication date: 2026-05-12
Last updated on: 2026-05-12
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| wp_seo_structured_data_schema | plugin | to 2.8.1 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The WP SEO Structured Data Schema plugin for WordPress has a vulnerability known as Stored Cross-Site Scripting (XSS) in all versions up to and including 2.8.1. This vulnerability arises because the plugin does not properly sanitize or escape input provided via the `_kcseo_ative_tab` parameter.
As a result, authenticated users with Contributor-level access or higher can inject malicious scripts into pages. These scripts will then execute whenever any user accesses the affected page.
How can this vulnerability impact me? :
This vulnerability can allow attackers with Contributor-level access or above to inject arbitrary web scripts into pages, which will execute in the browsers of users who visit those pages.
The impact includes potential theft of user data, session hijacking, defacement, or other malicious actions performed through the injected scripts.
The CVSS score of 4.9 indicates a medium severity, with the attack requiring network access, high attack complexity, and low privileges, but no user interaction.