---
taskmaster_id: "2.5"
status: "done"
priority: "medium"
depends_on: ["1"]
parent_id: "2"
source: "taskmaster"
generated_at: "2026-05-28T11:49:27.076Z"
---

# 2.5 - Lock Socket.IO room joins to authenticated context

- [x] 2.5 - Lock Socket.IO room joins to authenticated context #taskmaster #priority/medium #status/done 🔼 🆔 tm-2-5 ⛔ tm-1

## Metadata

| Field | Value |
| --- | --- |
| Taskmaster ID | 2.5 |
| Status | done |
| Priority | medium |
| Dependencies | 1 |
| Parent | 2 - Implement platform audit remediation plan |

## Description

Remove trust in client-supplied user/buyer/seller room IDs.

## Details

Validate socket handshake token, derive server-side room membership, reject mismatched joins, and monitor suspicious join attempts.

## Verification

A user cannot subscribe to another user's rooms; legitimate realtime notifications still arrive.
