GHSA-FHH6-4QXV-RPQJ 9router: Unauthenticated Remote Code Execution via unprotected MCP custom plugin routes

Summary 9router exposes two unauthenticated API endpoints that, when chained together, allow any network-adjacent attacker to execute arbitrary OS commands as the user running the 9router process — with zero prerequisites and no credentials required. The vulnerability exists because the Next.js...