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CVE-2025-4611

Slim SEO <= 4.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via slim_seo_breadcrumbs Shortcode

Published
Last modified
published
Not listed in CISA KEV
1 proof of concept on GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

The Slim SEO – Fast & Automated WordPress SEO Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's slim_seo_breadcrumbs shortcode in all versions up to, and including, 4.5.3 due to insufficient input sanitization and output escaping on user supplied attributes. 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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • rilwis Slim SEO – A Fast & Automated SEO Plugin For WordPress

    through 4.5.3

References 8

wordfence.com

wordpress.org

plugins.trac.wordpress.org

GitHub · elightup/slim-seo

GitHub · x6vrn/CVE-2025-4611-PoC