Roblox Security

When to Load

Load this skill when designing security systems, auditing code for vulnerabilities, or hardening a Roblox game against exploit vectors. Covers movement hacks, remote abuse, economy attacks, DataStore exploits, and server-authority patterns.

Quick Reference

Core: Client is always compromised. Server = only source of truth.

Vectors & Mitigations

| Vector | Attack | Fix | |--------|--------|-----| | Movement | Speed/teleport/fly/noclip | Server velocity+pos checks per Heartbeat | | Remote | Spam, arg spoof, replay | Rate limiter + validate arg types + idempotency | | Economy | Dupe, negative qty | Session lock, atomic ops, qty > 0 | | DataStore | Save spam, session hijack | Server-controlled saves, JobId session lock | | General | Client trusts values | Server computes ALL game state |

Key Patterns

-- Rate limiter
local function checkRate(player, remote): boolean
    local now = os.clock(); local lim = rateLimits[player]
    if not lim then lim = {}; rateLimits[player] = lim end
    if now - (lim[remote] or 0) < 0.1 then return false end
    lim[remote] = now; return true
end

-- Server-authoritative damage (never trust client)
AttackRemote.OnServerEvent:Connect(function(player, targetId)
    local weapon = getEquippedWeapon(player)
    local target = resolveTarget(targetId)
    if not weapon or not target or not isInRange(player, target) then return end
    target.Humanoid:TakeDamage(weapon.BaseDamage * getMultiplier(player))
end)

Audit Checklist

CRITICAL: Server-authoritative state · Validate all arg types · Rate limit remotes · Session-lock DataStore · No client currency mutations · ProcessReceipt verification · No sensitive LocalScript logic

HIGH: Server-validated movement · BindToClose protection · Atomic trading · Never trust client values

MEDIUM: Server cooldowns · Server leaderboards · Anti-AFK rewards · TextService filtering

Anti-Patterns

Don't: obfuscate client, use _G for security, kick without logging, over-validate movement, rely on client anti-cheat

See references/full.md for detailed examples.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: TabooHarmony
• Source: TabooHarmony/roblox-brain
• License: MIT

Install and usage instructions live in the source repository linked above.