GHSA-HG9J-64WP-M9PX Flarum Vulnerable to Session Hijacking via Authoritative Subdomain Cookie Overwrite

Summary A session hijacking vulnerability exists when an attacker-controlled authoritative subdomain under a parent domain e.g., subdomain.host.com sets cookies scoped to the parent domain .host.com. This allows session token replacement for applications hosted on sibling subdomains e.g.,...