minecraft-account-manager/docs/security-review.md

Security review

Review date: 2026-08-02

Scope

Next.js portal and APIs, Discord bot, PostgreSQL persistence, Keycloak admin authentication, and the Velocity admission plugin.

Automated checks

• Semgrep auto: 0 findings
• npm audit: 0 known vulnerabilities after dependency overrides
• TypeScript, ESLint, unit tests, Next.js production build: passing
• Velocity Java tests and shaded plugin build: passing

Implemented controls

• Discord login and session tokens use cryptographically secure randomness and are stored only as SHA-256 hashes.
• Login links expire after ten minutes, are single use, and are rate limited per Discord user with a PostgreSQL advisory lock.
• Session cookies are httpOnly, sameSite=lax, path-scoped, and secure in production.
• Admin access uses Keycloak OIDC and a required role.
• User mutations verify ownership server-side.
• Mojang lookup is server-side and targets a fixed host, avoiding client-forged validation and SSRF.
• Velocity credentials are high-entropy bearer tokens stored only as hashes.
• Velocity admission and confirmed-connection requests have a 45-second clock window and database-unique request IDs for cross-instance replay prevention.
• Velocity and its API fail closed.
• Registered players require an enabled effective group; explicit assignments replace rather than combine with the protected, disabled-by-default everyone fallback.
• Group and membership mutations re-check the Keycloak administrator role server-side; destructive group deletion and its audit event commit atomically.
• Event filters accept only event types already present in the ledger, and event detail routes remain role-protected.
• The administrator-only map defaults to bundled Natural Earth boundaries. OpenStreetMap tile requests begin only after an explicit operator opt-in; marker coordinates are not transmitted as data, but the requested tiles disclose the viewed geographic extent along with the administrator's IP and portal origin.
• Grouped-map popup labels and links are created with DOM textContent and server-rendered React escaping rather than interpolated HTML.
• ORM-parameterized queries are used throughout.
• CSP, clickjacking, MIME-sniffing, referrer, and browser-permission headers are configured.
• Forwarded IP headers are ignored unless TRUST_PROXY=true is explicitly configured.
• Private and reserved addresses are not sent to ProxyCheck.io; lookup results are cached to reduce disclosure and API usage.
• Portal and game login events include approximate network location and VPN/proxy classification when available. The administrator-only location list also exposes enriched network company, ASN, connection type, and the provider's proxy signal.
• Structured Pino logging redacts credential fields, and secrets are excluded from logs and repository configuration.

Outstanding production requirements

• Monitor ProxyCheck.io usage, detection quality, and false positives. User account additions fail closed when classification is unavailable; hosting-provider blocking remains optional.
• Define and automate retention for exact IP addresses, cached provider responses, approximate location, and audit events.
• Add monitoring and alerts for repeated login denials, plugin authentication failures, and Discord API failures.
• Use HTTPS for the public application and Velocity API URL. Protect the Velocity configuration file because it contains the one-time-displayed API token.
• Restrict database credentials so normal application roles cannot update or delete historical event rows outside approved application paths.
• Validate migrations in staging before production. Local migration application was unavailable during development because the Docker daemon was not running.