All in One SEO Pack <= 4.8.1.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Post Meta Description and Canonical URL

The All in One SEO – Powerful SEO Plugin to Boost SEO Rankings & Increase Traffic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the post Meta Description and Canonical URL parameters in all versions up to, and including, 4.8.1.1 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.