All in One SEO Pack < 4.8.2 - Contributor+ Stored XSS via Post Meta Description and Canonical URL

Description

The plugin is vulnerable to Stored Cross-Site Scripting via the post Meta Description and Canonical URL parameters 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.