How to Update WordPress Core, Themes & Plugins Safely

Knowing how to update WordPress core, themes, and plugins safely is one of the most important skills any WordPress site owner can develop. Updates patch security vulnerabilities, fix bugs, and introduce performance improvements — but applying them without preparation can occasionally break your site. This guide walks you through every step of a safe, reliable WordPress update workflow so you can keep your site current with confidence.

Why Keeping WordPress Updated Matters

WordPress powers over 43% of all websites on the internet, which makes it a frequent target for hackers. The majority of successful WordPress attacks exploit known vulnerabilities in outdated versions of core, themes, or plugins. Staying up to date is your first and most effective line of defence.

Beyond security, updates bring real benefits:

Performance improvements: Each major WordPress release typically includes speed and efficiency gains.
New features: Block editor enhancements, new APIs, and developer tools arrive with core updates.
Bug fixes: Plugin and theme authors release patches that resolve known conflicts and errors.
Compatibility: Keeping everything updated reduces the risk of plugin conflicts caused by outdated code.

Skipping updates might feel safe in the short term, but it compounds risk over time. A site running WordPress 5.x plugins on WordPress 6.x core is a recipe for unexpected errors.

Step 1 — Create a Full Backup Before Any Update

Never update WordPress without a current backup. This single habit will save you from disaster more than any other precaution. A complete backup includes your database and all your files.

Backup Using a Plugin

The easiest method for most users is a dedicated backup plugin. Popular and reliable options include:

UpdraftPlus — Free, widely used, supports cloud storage destinations.
BlogVault — Includes a staging environment and one-click restore.
All-in-One WP Migration — Simple export/import workflow ideal for smaller sites.

Install and activate your chosen backup plugin from the WordPress dashboard.
Navigate to the plugin settings and configure a remote storage destination (Google Drive, Dropbox, Amazon S3, or similar).
Run a full manual backup and confirm it completes without errors.
Download the backup file to your local computer as an extra precaution.
Verify you can see both the database file and the files archive in your backup destination.

Backup via cPanel or Hosting Dashboard

Most managed WordPress hosts and cPanel-based hosts offer one-click backups from the control panel. Log in to your hosting account, locate the backup tool, and create a full-account backup before proceeding. Some hosts like WP Engine, Kinsta, and Flywheel create automatic daily backups you can restore with one click.

Backup Using WP-CLI

If you have SSH access to your server, WP-CLI offers the fastest way to export your database:

# Export the database to a SQL file
wp db export backup-before-update.sql --allow-root

# Compress your WordPress files
tar -czf wordpress-files-backup.tar.gz /var/www/html/

Store both files in a location outside your web root so they cannot be accessed via a browser.

Step 2 — Set Up a Staging Environment

A staging environment is a private clone of your live site where you can test updates before pushing them to production. This step is optional for small personal blogs but strongly recommended for business or e-commerce sites.

Using Your Host's Built-In Staging

Many premium WordPress hosts (WP Engine, Kinsta, SiteGround, Cloudways) offer one-click staging. Look for a "Staging" option in your hosting dashboard, create a clone of your live site, and apply updates there first.

Using a Plugin to Create Staging

Install the WP Staging plugin from the WordPress repository.
Go to WP Staging > Sites and click Create New Staging Site.
Choose which tables and files to include (select all for a complete clone).
Click Start Cloning and wait for the process to finish.
Access the staging URL provided and apply your updates there first.
Test the site thoroughly before repeating the same updates on your live site.

Step 3 — Update WordPress Core

With your backup confirmed and staging tested, you are ready to update. WordPress core updates come in two types: minor updates (e.g., 6.4.1 to 6.4.2) which are security and maintenance releases, and major updates (e.g., 6.4 to 6.5) which include new features. Minor updates are generally safe to apply immediately; major updates warrant more careful testing.

Updating Core via the Dashboard

Log in to your WordPress admin panel.
Navigate to Dashboard > Updates.
If a new version of WordPress is available, you will see a notice at the top of the page.
Click the Update to version X.X.X button.
Wait for the update to complete — WordPress will display a progress screen and then redirect you to the about page for the new version.
Check your site's front end and admin area immediately after the update.

Updating Core via WP-CLI

WP-CLI is the fastest and most reliable method for updating WordPress core, especially on servers where the web server user has limited write permissions:

# Check the current WordPress version
wp core version

# Update WordPress core to the latest stable release
wp core update

# Update the WordPress database after a core update
wp core update-db

Always run wp core update-db after a major version update to ensure database tables are migrated to the new schema.

Controlling Automatic Core Updates

WordPress can apply minor updates automatically. You can control this behaviour by adding a constant to your wp-config.php file:

// Enable automatic updates for minor releases only (default behaviour)
define( 'WP_AUTO_UPDATE_CORE', 'minor' );

// Enable automatic updates for ALL releases including major versions
define( 'WP_AUTO_UPDATE_CORE', true );

// Disable ALL automatic core updates
define( 'WP_AUTO_UPDATE_CORE', false );

For most site owners, leaving the default 'minor' setting in place is the right balance between convenience and control.

Step 4 — Update Themes and Plugins Safely

Plugins are the most common source of post-update conflicts. Because plugins are built by thousands of independent developers, compatibility issues between plugins, between a plugin and a theme, or between a plugin and a new version of core do occur. A methodical update approach minimises this risk.

Updating Plugins One at a Time

Go to Dashboard > Updates or Plugins > Installed Plugins.
Review the changelog for each plugin before updating — click the View version X details link to read release notes.
Deactivate caching plugins before starting updates to prevent cached error states.
Update plugins one at a time, not all at once using the bulk update button.
After each plugin update, visit your site's front end and check key pages (home page, checkout, contact form, etc.).
If something breaks after a specific plugin update, deactivate that plugin and contact the developer or roll back using a plugin like WP Rollback.

Updating Themes Safely

If you have customised a parent theme directly, those changes will be overwritten by an update. Always use a child theme for customisations.
Go to Dashboard > Updates and scroll to the Themes section.
Review the changelog via the theme details link.
Update your active theme and any inactive themes you plan to keep.
Check the front end of your site after the update for visual changes or broken layouts.

Bulk Updates with WP-CLI

On a staging environment or when you are confident in your backup, WP-CLI can update everything at once:

# Update all plugins
wp plugin update --all

# Update all themes
wp theme update --all

# Update everything (core, plugins, themes) in one command
wp core update && wp plugin update --all && wp theme update --all && wp core update-db

Step 5 — Test Your Site After Updates

Applying updates is only half the job. A thorough post-update check ensures nothing has silently broken.

Essential Post-Update Tests

Front end check: Visit your home page, a blog post, a product page, and your contact page in an incognito browser window to rule out cached views.
Admin check: Navigate through key admin screens — post editor, WooCommerce orders, form submissions — to confirm everything functions.
Console errors: Open your browser's developer tools (F12) and check the Console tab for JavaScript errors.
Form submissions: Submit a test entry on any contact or checkout forms.
Caching: Clear all caching layers — plugin cache, server-side cache, and CDN cache — and test again.
Performance: Run a quick speed test via GTmetrix or PageSpeed Insights to confirm no regression.

What to Do If Something Breaks

Identify the most recently updated item (check the Updates log in your dashboard or server logs).
Deactivate or roll back that plugin or theme using WP Rollback.
If the site is completely inaccessible, restore from the backup you created in Step 1.
Enable WP_DEBUG temporarily to see error messages: add define( 'WP_DEBUG', true ); to wp-config.php.
Contact the plugin or theme developer with your PHP error log for support.

Best Practices and Ongoing Maintenance

Building a consistent update routine is better than sporadic bursts of maintenance. Consider the following practices to keep your site healthy long-term:

Schedule updates weekly — Set aside 20–30 minutes every week to check for and apply updates in low-traffic hours.
Use a maintenance mode plugin — Display a friendly maintenance page to visitors during updates so they do not encounter a broken site mid-update.
Monitor for updates with ManageWP or MainWP — These tools let you manage updates across multiple WordPress sites from a single dashboard.
Remove unused plugins and themes — Inactive plugins and themes can still be exploited. Delete anything you are not actively using.
Check PHP version compatibility — Before updating WordPress core, confirm your server is running a PHP version supported by the new release. WordPress 6.x requires PHP 7.4 or higher, with PHP 8.x recommended.
Enable update notifications — WordPress sends email alerts for automatic updates. Make sure admin email notifications are working so you are aware of what has been updated automatically.

By following this complete workflow — backup, stage, update core, update plugins and themes one at a time, then test — you will rarely if ever encounter a site-breaking update. The few minutes of preparation before each update session are always worth the insurance they provide.

As your site grows, consider using WP AI Agent, a natural-language AI chat tool that can handle WordPress tasks like running updates, creating backups, and managing plugins through simple conversational commands — no manual dashboard navigation required.

Frequently Asked Questions

Is it safe to use the bulk update button to update all plugins at once?

Technically you can, but it is not recommended for production sites. Updating plugins one at a time allows you to isolate exactly which plugin caused a problem if something breaks. On a staging environment where you have already tested updates, bulk updating is perfectly acceptable.

How often should I update WordPress core, themes, and plugins?

Security and minor maintenance releases should be applied as soon as possible — within a day or two of release. Major core releases can be applied within a week or two after allowing time for any critical bugs to be patched in a follow-up release. Aim to review your updates dashboard at least once a week.

What should I do if a plugin update breaks my site?

First, try deactivating the problematic plugin via the WordPress admin or, if the admin is inaccessible, by renaming the plugin folder via FTP or your host's file manager. Then restore from your pre-update backup if deactivation does not resolve the issue. Use WP Rollback to revert the plugin to its previous version while you wait for the developer to release a fix.

Can I disable automatic updates in WordPress?

Yes. You can control automatic updates by adding constants to your wp-config.php file. Setting define( 'WP_AUTO_UPDATE_CORE', false ); disables all automatic core updates. Individual plugins can also be excluded from automatic updates using the auto_update_plugin filter hook in your theme's functions.php or a custom plugin.

How to Update WordPress Core, Themes, and Plugins Safely