How to Update WordPress Safely: A Practical Checklist for Core, Plugins and Themes

Keeping WordPress updated sounds simple.

You log in, see several update notifications, click a few buttons and wait for the messages to disappear.

On a small personal website, that may sometimes be all there is to it.

On a business website, however, updates deserve a little more care.

A WordPress website is rarely just WordPress itself. It is a combination of the WordPress core software, a theme, multiple plugins, hosting software, PHP, caching systems and often external services such as payment gateways, email systems, analytics or CRM integrations.

Changing one part can occasionally affect another.

That does not mean WordPress updates are dangerous or should be avoided. Quite the opposite: staying current is an important part of keeping a website secure, compatible and maintainable.

The better approach is simply to treat updates as controlled maintenance rather than random button-clicking.

This guide explains why WordPress updates matter, how to perform them safely, what to test afterwards and what to do if something goes wrong.

What Does “Updating WordPress” Actually Mean?

When someone says they need to “update WordPress,” they may be referring to several different things.

WordPress core

This is the main WordPress software itself.

Core releases may include:

• security fixes;
• bug fixes;
• performance improvements;
• accessibility improvements;
• new editor features;
• improvements to APIs and other underlying systems.

WordPress recommends staying on the latest version, particularly because releases can include important security fixes.

Plugins

Plugins add functionality such as:

• contact forms;
• ecommerce;
• SEO tools;
• caching;
• security;
• backups;
• sliders;
• memberships;
• analytics;
• custom fields.

Plugin developers release updates independently of WordPress.

Those updates may fix vulnerabilities or bugs, improve compatibility, add functionality or change the way existing features work.

Themes

Themes control much of a website’s presentation and may also contain functional code.

Theme updates can therefore affect:

• layouts;
• templates;
• styling;
• editor behaviour;
• custom blocks;
• PHP compatibility.

Hosting and server software

PHP, database software and the web server are separate from WordPress, but they form part of the environment WordPress runs within.

A WordPress update may work perfectly while an outdated plugin fails after a PHP upgrade—or the reverse.

For that reason, maintaining WordPress is better understood as maintaining an ecosystem, not simply one piece of software.

That flexibility is one of the reasons WordPress remains such a capable platform for business websites, but flexibility also means the different parts need to remain compatible. We discuss the broader platform in our guide to why WordPress remains one of the best platforms for modern business websites.

Why Is It Important to Keep WordPress Updated?

There are several reasons.

1. Security Vulnerabilities Get Discovered

Security is probably the most important reason not to ignore updates indefinitely.

Software vulnerabilities are discovered over time.

When developers release a patch, the existence of the vulnerability may become publicly known as well.

An outdated plugin, theme or WordPress installation can therefore remain exposed to a weakness that has already been fixed in a newer version.

WordPress documentation specifically recommends keeping plugins and themes up to date to help maintain security.

Updating alone does not make a WordPress site completely secure.

Security also involves areas such as:

• strong authentication;
• sensible user permissions;
• backups;
• vulnerability monitoring;
• secure hosting;
• malware protection;
• firewall configuration;
• limiting unnecessary software.

Our WordPress security guide covers those wider measures.

But keeping software current removes one very avoidable source of risk.

2. Plugins and Themes Need to Remain Compatible

A WordPress website evolves gradually.

WordPress changes.

PHP changes.

Browsers change.

Plugins change.

Themes change.

Problems can appear when one component remains several generations behind everything around it.

For example, an old plugin might depend on functions that have since changed or been deprecated.

A newer plugin may require a newer version of WordPress.

A hosting provider might introduce a newer PHP version that exposes problems in an abandoned theme.

Regular maintenance prevents large compatibility gaps from accumulating.

It is usually easier to deal with a few incremental updates than to discover several years later that half the website must jump multiple major versions at once.

3. Updates Fix Bugs

Not every update introduces a new feature.

Many simply fix things.

A plugin may resolve:

• form problems;
• editor errors;
• JavaScript conflicts;
• database issues;
• browser compatibility problems;
• PHP warnings;
• incorrect output;
• accessibility problems.

WordPress core updates similarly include bug fixes and maintenance improvements.

If your website is running an old version, you may therefore be troubleshooting a problem that its developer has already fixed.

4. Updates Can Improve Performance

Software evolves partly because developers discover more efficient ways of doing things.

Updates may improve:

• database queries;
• script loading;
• caching behaviour;
• image handling;
• editor performance;
• frontend rendering.

That does not mean every update will make every website faster.

Performance depends on the complete website.

But remaining on supported, current software generally gives you access to current optimization techniques and avoids carrying obsolete code indefinitely.

5. Newer Software Is Easier to Support

Troubleshooting an outdated site can become increasingly difficult.

Plugin developers may no longer test against very old WordPress versions.

Documentation may assume a newer release.

Hosting environments move forward.

Support teams understandably focus on currently supported software.

Keeping a site reasonably current reduces the number of historical compatibility problems that have to be considered when something does fail.

Before Updating WordPress: Do These Things First

This is the part that turns an update from a gamble into a maintenance procedure.

1. Take a Complete Backup

Before significant updates, make sure you have a current backup.

A WordPress website effectively consists of two major components:

• files;
• database.

You need both to restore the site properly.

The database contains things such as:

• posts;
• pages;
• settings;
• users;
• ecommerce data;
• form configuration;
• plugin data.

Files contain:

• themes;
• plugins;
• media;
• configuration and other website files.

WordPress documentation itself advises having a current backup before performing updates.

But there is an important distinction:

Having a backup is not the same as knowing you can restore it.

You should know:

• where the backup is stored;
• what it contains;
• when it was created;
• how restoration would work.

If the only backup exists inside the same hosting account as the website, it is also worth considering whether an off-site copy should exist.

2. Know What You Are Updating

Do not treat a screen showing twelve available updates as one update.

Look at what has changed.

Is it:

• a minor plugin patch;
• a major WooCommerce release;
• a WordPress core update;
• a theme update;
• a page builder;
• a custom integration;
• a security patch?

The potential impact differs considerably.

For important updates, read the changelog or release information.

Look especially for:

• breaking changes;
• minimum PHP requirements;
• minimum WordPress requirements;
• database migrations;
• discontinued features;
• compatibility notes.

3. Consider the Importance of the Website

The safer workflow should reflect the consequences of failure.

A small brochure site and a high-volume ecommerce site do not necessarily need identical procedures.

Extra caution makes sense for websites handling:

• purchases;
• memberships;
• bookings;
• advertising campaigns;
• business-critical enquiries;
• large amounts of traffic;
• custom code;
• complex third-party integrations.

If an hour of downtime would materially affect the business, treat updates accordingly.

4. Use Staging When the Risk Justifies It

A staging website is a separate copy where changes can be tested before they affect visitors.

It can be particularly useful for:

• major WordPress releases;
• WooCommerce changes;
• page builders;
• complex themes;
• custom plugins;
• significant PHP upgrades;
• large batches of overdue updates.

Not every tiny plugin patch on every simple website needs an elaborate staging deployment.

The point is to apply more testing as the potential consequence increases.

5. Check That You Have a Recovery Route

Before pressing Update, ask:

If this breaks the site, what will I do next?

Possible recovery routes might include:

• restoring the latest backup;
• rolling back a plugin version;
• disabling a faulty plugin;
• reverting a deployment;
• restoring the database;
• using hosting snapshots.

The right answer depends on how the website is managed.

But there should be an answer.

How to Update WordPress Safely

Once the preparation is complete, the actual update process is usually straightforward.

Step 1: Review All Pending Updates

Go to:

Dashboard → Updates

and review what is waiting.

You can also see individual plugin and theme updates from their respective administration screens.

Do not automatically assume every available update has the same urgency.

Security updates may deserve prompt attention.

A major feature release on a complex production website may deserve testing first.

Step 2: Avoid Changing Too Many Unrelated Things at Once

This is especially useful on larger websites.

Suppose you simultaneously:

• update WordPress;
• update 25 plugins;
• change PHP version;
• update the theme;
• modify caching settings.

Then the site breaks.

Which change caused it?

You have made diagnosis unnecessarily difficult.

For routine maintenance, updating sensible groups or batches gives you much better visibility if something fails.

This does not mean every plugin must always be updated individually.

It simply means retain enough control to know what changed.

Step 3: Do Not Rely on a Universal Update Order

You will sometimes see rules such as:

Always update plugins first.

or:

Always update WordPress first.

There is no universal sequence that is safest for every WordPress installation.

Dependencies matter.

For example, a plugin release may specifically require the latest WordPress version.

Another plugin may recommend updating itself before a larger platform change.

The better approach is:

1. review what is changing;
2. check important compatibility information;
3. update in controlled stages;
4. test after meaningful changes.

That is safer than following a rigid sequence without understanding the website.

Step 4: Let Updates Finish

Do not close the browser halfway through an update simply because it appears to be taking longer than expected.

WordPress can temporarily place the site into maintenance mode while update files are being replaced. WordPress’s own update process creates a .maintenance file during core upgrades and removes it when the process completes.

Interrupting an update can leave files only partially replaced.

If an update genuinely stalls, investigate rather than repeatedly clicking update buttons.

Step 5: Clear Relevant Caches

After updating, the website may still serve older cached files.

Depending on the setup, this might include:

• WordPress caching plugin;
• server cache;
• object cache;
• browser cache;
• CDN cache.

Clearing the appropriate caches can prevent an old CSS or JavaScript file from being combined with newly updated code.

Do not purge everything indiscriminately every few minutes, but do make cache clearing part of the post-update process where appropriate.

What Should You Test After Updating WordPress?

A green “updated successfully” message only means the update process completed.

It does not prove that the entire website still works.

This is where a two-minute check can sometimes prevent a much larger problem.

Check the homepage

Look for:

• broken layout;
• missing images;
• JavaScript errors;
• unusual spacing;
• missing sections.

Check important internal pages

Choose pages that represent different parts of the site.

For example:

• service page;
• blog page;
• contact page;
• landing page.

Test the contact form

This is one of the checks we consider particularly important.

Do not merely look at the form.

Submit it.

Then confirm that:

• submission succeeds;
• confirmation displays correctly;
• notification email arrives;
• stored submission exists if the system stores entries.

A website can appear perfectly healthy while quietly losing every enquiry.

Test ecommerce functionality

For a store, consider:

• product pages;
• cart;
• coupons where relevant;
• checkout;
• payment gateway;
• transactional emails.

A staging environment may be especially valuable here.

Test membership or login functionality

If users log into the site, check:

• login;
• logout;
• account pages;
• password reset;
• restricted content.

Check mobile behaviour

A plugin or theme update can affect responsive styling.

Quickly examine important pages on a smaller viewport.

Check integrations

Depending on the site:

• analytics;
• CRM;
• email marketing;
• booking tools;
• maps;
• external APIs;
• chat;
• payment systems.

The key question is:

What functionality would hurt the business most if it silently stopped working?

Test that first.

Should You Enable Automatic WordPress Updates?

Automatic updates can be useful.

WordPress supports automatic updates for plugins and themes, and WordPress documentation advises maintaining backups so a site can be rolled back if an automatic update causes a problem.

But “enable everything” is not automatically the right policy for every website.

Auto-updates may make sense when:

• the website is relatively simple;
• plugins are well maintained;
• reliable backups exist;
• uptime is monitored;
• somebody will notice failures;
• rollback is straightforward.

More controlled updates may make sense when:

• the website processes sales;
• custom code depends on plugins;
• there are complex integrations;
• downtime has significant commercial impact;
• major plugins frequently change behaviour;
• updates need formal testing.

You can also use a mixed strategy.

Some low-risk plugins may update automatically while more critical components receive manual review.

The important point is that automation should be paired with backup, monitoring and recovery, not used as a substitute for them.

How Quickly Should You Install Security Updates?

A maintenance schedule is useful.

But security vulnerabilities do not care about your calendar.

A business might normally review routine updates weekly or monthly.

If a serious vulnerability affecting an installed plugin becomes known, waiting several weeks simply because “updates happen on the first Monday of the month” may be unnecessary risk.

A sensible maintenance process therefore has two speeds:

Routine updates
Handled during the normal maintenance cycle.

Important security updates
Reviewed and applied sooner when appropriate.

This is another reason vulnerability monitoring is useful.

You do not need to constantly log into WordPress hoping to notice something important.

What If a WordPress Update Breaks the Site?

First, avoid making ten more changes in panic.

The objective is to identify what changed and get the site back to a known working condition.

1. Check what was just updated

Was it:

• WordPress core;
• one plugin;
• several plugins;
• theme;
• PHP?

The smaller the batch of changes, the easier this becomes.

2. Clear caches

A surprising number of apparent post-update layout problems are old cached assets interacting with new files.

Clear relevant caches and test again.

3. Look for the actual error

Depending on the failure, useful information may be available from:

• WordPress error logs;
• PHP logs;
• browser developer tools;
• server logs;
• plugin logs.

An error message is much more useful than guessing.

4. Disable the suspected plugin where appropriate

If the dashboard remains accessible, temporarily disabling the likely plugin can confirm whether it is involved.

If the dashboard is inaccessible, an experienced administrator may use file access or WP-CLI to disable a plugin.

5. Restore or roll back if necessary

This is why the backup came first.

Sometimes troubleshooting immediately is appropriate.

Sometimes the sensible business decision is:

restore service first, investigate afterwards.

For a production website receiving enquiries or sales, restoring the known-good version may be preferable to debugging live for hours.

Common WordPress Update Mistakes

Updating without a recent backup

The vast majority of updates work normally.

The backup exists for the exception.

Updating everything at once and never testing

This turns a manageable problem into a mystery if something breaks.

Ignoring updates for years because the site “still works”

Working today does not mean compatible or secure tomorrow.

The longer the gap becomes, the more difficult the eventual upgrade may be.

Assuming an update notification means “click immediately”

Sometimes it should be applied quickly.

Sometimes a significant release deserves testing first.

Context matters.

Never testing forms after updates

A broken form can cost money without producing any obvious visual error.

Keeping abandoned plugins indefinitely

A plugin that has not been maintained for years can become a growing compatibility and security concern.

At some point the right solution may be replacement rather than another workaround.

Forgetting custom code

Custom functionality deserves particular attention.

A custom plugin or theme may depend on WordPress APIs or third-party plugins whose behaviour changes over time.

Good development practices reduce this risk. Our guide to common mistakes when building a custom WordPress plugin discusses some of those maintainability issues.

Assuming updates are the whole maintenance job

Updates are important.

But website care also includes:

• backups;
• uptime monitoring;
• security monitoring;
• form testing;
• performance checks;
• broken-link checks;
• SSL;
• domain renewal;
• PHP compatibility;
• recovery planning.

That is why we treat updates as one part of broader website maintenance, not the entire maintenance strategy.

How Often Should You Update WordPress?

There is no single frequency appropriate for every site.

The better rule is:

Do not allow updates to accumulate indefinitely, and do not unnecessarily delay important security fixes.

For many ordinary business websites, a regular scheduled maintenance cycle works well.

More complex or high-risk websites may need:

• more frequent review;
• staging;
• formal testing;
• tighter monitoring.

The specific schedule matters less than having a repeatable process.

A website that receives careful maintenance once a month may be in far better condition than one whose owner logs in randomly every few days and presses Update without backups or testing.

The WordPress Update Process We Prefer

In our own WordPress maintenance work at Ray Creations, we do not consider the job complete when the update notifications disappear.

The practical workflow is closer to:

1. make sure a usable backup exists;
2. review what needs updating;
3. assess anything that deserves extra testing;
4. apply the updates in a controlled way;
5. clear relevant caches;
6. inspect important pages;
7. test critical functionality such as forms;
8. watch for problems afterwards;
9. retain a recovery route if anything unexpected appears.

The process is deliberately unexciting.

That is a good thing.

Website maintenance should generally feel routine rather than dramatic.

A Simple WordPress Update Checklist

Before an update:

• Is there a current full backup?
• Do you know how that backup could be restored?
• What exactly is being updated?
• Is this a major or security-sensitive release?
• Does anything need staging?
• Is the timing appropriate?

During the update:

• Avoid unnecessary simultaneous changes.
• Allow each update to finish.
• Note failures or warnings rather than ignoring them.

After the update:

• Clear relevant caches.
• Check the homepage.
• Check important pages.
• Test forms.
• Test ecommerce or membership functionality where applicable.
• Check mobile layouts.
• Verify critical integrations.
• Watch for PHP or JavaScript errors.

If something fails:

• Identify the most recent change.
• Avoid introducing more unrelated changes.
• Restore or roll back where appropriate.
• Diagnose the problem away from the live site if possible.

Final Thoughts

WordPress updates are important because a modern website is living software.

Security vulnerabilities are discovered.

Browsers and servers evolve.

Plugins improve.

Bugs are fixed.

WordPress itself moves forward.

The solution is not to avoid updates because something might break.

Nor is it to click every available update without preparation.

The sensible middle ground is to keep the website current through a repeatable maintenance process with backups, testing and a recovery plan.

For a simple site, that process may take only a few minutes.

For an ecommerce store or heavily customized business website, it may involve staging and more extensive testing.

The principle is the same:

update deliberately, verify afterwards and always know how you would recover.

If you would rather not manage that process yourself, our Website Maintenance service covers ongoing WordPress care, backups, updates and monitoring so that maintenance becomes a routine operational task rather than something you have to remember when warning badges appear in the dashboard.