Astra < 4.6.5 - Editor+ Stored XSS via Theme Header/Footer

Description

The theme is vulnerable to Stored Cross-Site Scripting via the theme header and footer content due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.