CMS DEVELOPMENT

Your WordPress Network Just Became Your Biggest Liability

If you're running 30+ subsites on shared infrastructure, you're one plugin vulnerability away from a network-wide breach.

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CMS DEVELOPMENT AT A GLANCE
  • Next.js
  • Supabase
  • Vercel
  • WP REST API
  • Row-Level Security
  • Supabase Auth
  • 95+LIGHTHOUSE AVG
  • 12+ yrsSENIOR-LED
  • Fixed feeNO SCOPE CREEP
  • 200+PROJECTS SHIPPED
CLUTCH 5.0 VERIFIED

Overview — 01

WordPress Multisite made sense in 2012. In 2026, prefixed tables, shared vulnerabilities, and plugin conflicts across 30+ subsites aren't architecture -- they're technical debt you're paying interest on every day.

WordPress Multisite Migration

WordPress Multisite Migration is the structured process of decomposing a shared-database, shared-codebase WordPress network into independently deployable Next.js sites backed by a Supabase Postgres database. Each subsite retains its domain routing, slug structure, media references, and user permissions while eliminating the shared attack surface of a monolithic wp_* table namespace. The result is a statically rendered or server-rendered frontend with a typed API layer replacing the WordPress REST API and wp-admin.

The gap — 02

What is holding your current website back?

Common gaps we find in nearly every audit.

A single vulnerable plugin installed network-wide exposes every subsite simultaneously, because Multisite shares one codebase and one database across all 30+ properties.
Risk: One unpatched plugin can trigger a network-wide breach, leaking user data, defacing all subsites, and triggering regulatory notification obligations across every domain you operate.
Prefixed tables and shared user tables make it impossible to isolate one subsite's data for auditing, export, or GDPR deletion requests without writing custom SQL against a schema WordPress was never designed to be queried externally.
Risk: Inability to produce clean per-site data exports or deletions puts you in direct conflict with GDPR Article 17 and CCPA deletion obligations, exposing the organization to regulatory fines.
Plugin conflicts between subsites running different themes and feature sets force you to either lock the network to a lowest-common-denominator plugin version or accept that updates will silently break subsites you cannot easily monitor.
Risk: Deferred plugin updates to avoid breaking subsites mean your network stays on known-vulnerable versions for months at a time, compounding the attack surface with each passing release cycle.

Safeguards — 03

How we build this right

Every safeguard, built in from Day 1.

Per-Site Data Isolation

Supabase row-level security policies enforce strict per-site data boundaries at the database layer, ensuring no subsite query can return rows belonging to another property, satisfying data segregation requirements for GDPR and SOC 2 audits.

Dependency Surface Reduction

Eliminating WordPress core, wp-admin, and the plugin ecosystem removes the most commonly exploited attack vectors in the CMS category. The Next.js and Supabase stack has a materially smaller and more auditable dependency tree.

Redirect and Canonical Integrity

Every existing permalink, per-domain redirect rule, and canonical URL is mapped and verified before cutover using automated crawl diffing, ensuring no broken links that would trigger search ranking drops or compliance audit failures on link integrity.

Scope — 04

What we build

Purpose-built features for your industry.

Prefixed Table Schema Extraction

We parse every wp_{blogid}_ prefixed table in your network database, extract normalized content, taxonomy, and meta records per subsite, and load them into structured Supabase schemas with foreign key constraints and typed columns that WordPress never enforced.

Per-Domain Routing in Next.js

Each subsite domain is handled via Next.js middleware-based host routing, so a single deployment serves all 30+ properties with per-site theme, navigation, and content configuration resolved at request time without separate deployments per subsite.

Media Library Rewrite and CDN Migration

WordPress uploads directories are inventoried, deduplicated across subsites, uploaded to a CDN-backed object store, and all in-content src references are rewritten during migration. No media links break at cutover and no files are served from the old server after go-live.

Shared User and Role Portability

WordPress Multisite user roles are mapped to a Supabase auth schema with per-site role assignments, preserving super admin, site admin, editor, and subscriber distinctions. Existing users receive a password-reset flow rather than losing access, and no passwords are migrated in cleartext.

Stack — 05

Built on a modern, secure stack

Next.jsSupabaseVercelWP REST APIRow-Level SecuritySupabase Auth

Process — 06

Our development process

From discovery to launch. Quality at every step.

01

Network Audit and Schema Map

1-2 weeks

We connect to your Multisite database and crawl the full table set, plugin list, active themes per subsite, and domain configuration. You receive a written inventory of every prefixed table, all plugin dependencies, and a risk-ranked list of migration blockers before any code is written.

02

Supabase Schema Design and ETL Build

2-3 weeks

We design the normalized Postgres schema for your content types, build an idempotent ETL pipeline that extracts from WordPress and loads into Supabase, and run the pipeline against a staging copy of your production database until output diff rates are below one percent.

03

Next.js Build and Per-Site Configuration

2-4 weeks

Frontend components are built to match your existing designs per subsite, host-based routing is configured in middleware, and each domain is verified in a password-protected staging environment with full content, media, and navigation parity against the live WordPress network.

04

Cutover, Redirect Verification, and Handoff

1-2 weeks

DNS cutover is executed per domain in a controlled sequence with automated redirect verification running against the full crawled URL set from audit. WordPress remains available in read-only mode for two weeks post-cutover as a fallback before decommission. Documentation and CMS training are delivered at handoff.

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Related resources — 07

Solution WordPress to Nextjs Migration Solution WordPress Migration Agency Los Angeles Solution WordPress Migration Agency Sydney Solution WordPress Migration Agency Nyc Solution WordPress Site Audit Migration Roadmap Solution WordPress Membership Site Migration Nextjs

Questions — 08

Frequently asked questions

Here's what makes a Multisite migration genuinely complex: each subsite has its own prefixed database tables (wp_2_posts, wp_3_options), but everyone shares a single wp_users table with per-site capabilities baked in. Media lives in separate /sites/[id]/ directories. Serialized data holds domain-specific references scattered throughout. Extracting one subsite means remapping all prefixed tables, rewriting serialized data without corruption, migrating media paths, and handling per-domain DNS -- then doing that again for every subsite in the network.
For domain-mapped subsites, we handle DNS cutover per domain, SSL certificate provisioning, and 301 redirect implementation from the old domain to its new path structure. Each custom domain gets its own Google Search Console property update and dedicated indexing monitoring. We coordinate cutover timing to minimize downtime across all domains -- staggering where it makes sense, batching where it doesn't.
WordPress Multisite stores all users in one wp_users table with per-site capabilities like wp_2_capabilities and wp_3_capabilities. We extract each user's per-site roles, map them to Supabase Auth, and assign location-specific permissions using Row-Level Security. The end result: a single login with the right access level per location, without anyone seeing content they shouldn't.
We build 301 redirect maps for every URL across every subsite, including domain-mapped custom domains. Google Search Console properties get set up per domain with updated sitemaps submitted on launch day. We monitor indexing for 30 days post-launch across all former subsites to catch anything that slips through. Worth noting: the performance jump from static HTML typically helps rankings rather than hurting them.
Timeline scales with network size. A 5-10 subsite network usually takes 8-10 weeks. Networks in the 25-50 subsite range run 12-16 weeks. Enterprise networks with 50+ subsites, complex domain mapping, and custom functionality can take 16-24 weeks. The audit phase nails down an accurate timeline for your specific network -- the numbers above are starting points, not guarantees.
WordPress Multisite networks are high-value targets precisely because one plugin vulnerability hits every subsite simultaneously. After migration, your sites are pre-rendered static HTML served from a CDN -- no PHP runtime, no database exposed to the web, nothing for a plugin exploit to grab onto. The attack surface drops to essentially zero. No more Wordfence alerts at 2am. No more emergency patches. No more holding your breath every time a plugin update drops.

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Get started — 10

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