Perform WordPress updates correctly: security, compatibility and backup strategy

Perform WordPress updates correctly: security, compatibility and backup strategy

Regular updates are among the most important maintenance tasks for a WordPress website. They close security vulnerabilities, fix bugs, improve compatibility and add new features. An outdated WordPress installation, old plugins or unmaintained themes can represent a significant security risk.

At the same time, updates should not be carried out without preparation. Especially with business-critical websites, WooCommerce shops, member areas or extensive plugin setups, an update can have unexpected side effects. The rule is therefore: updates are important, but they should be performed with a backup, testing and a clear sequence.

Why WordPress updates are so important

WordPress is used very widely worldwide. This also makes it a popular target for automated attacks. Many attacks are not aimed personally at individual websites, but automatically search for known vulnerabilities in old WordPress versions, plugins or themes.

Updates help with:

• Security: Known vulnerabilities are closed.
• Stability: Bugs and compatibility problems are fixed.
• Performance: New versions can work more efficiently.
• Compatibility: WordPress, PHP, plugins and themes remain better aligned with each other.
• Features: New features and improvements become available.
• Maintainability: An up-to-date website is easier to maintain and repair.

WordPress itself recommends always updating to a current version. Updates can be performed via the WordPress admin area using a one-click update; if that does not work, there is also a manual update process.

Which WordPress components are updated?

A WordPress website consists of several parts. Updates therefore do not only affect WordPress itself.

1. Before every update: create a backup

Before you perform updates, you should create a complete backup. This applies especially to plugin updates, theme updates, major WordPress versions, WooCommerce updates and changes to the PHP version.

A complete backup includes:

• WordPress files,
• theme files,
• plugin files,
• media library and uploads,
• database,
• wp-config.php,
• if applicable, .htaccess.

A backup is only truly helpful if it can be restored in an emergency. Therefore, regularly check whether your backups are complete and accessible.

• Guide: create and restore a backup before updates

2. Staging instead of live experiments

For important websites, updates should first be tested in a staging environment. A staging environment is a copy of your website where you can safely check updates.

Staging is especially recommended for:

• WooCommerce shops,
• member sites,
• booking systems,
• websites with many plugins,
• major version jumps,
• PHP upgrades,
• theme changes,
• critical forms or interfaces.

If everything works in staging, you can transfer the changes to the live website in a controlled manner.

3. Perform updates in the dashboard

The simplest method is updating directly in the WordPress dashboard. You can find all available updates under:

Dashboard > Updates

There you can see whether updates are available for WordPress Core, plugins, themes or translations. WordPress offers a one-click update process for most websites. As soon as a new version is available, a notice appears in the admin area.

Recommended order:

1. Create a backup.
2. Carry out a staging test if the website is important or complex.
3. Update translations.
4. Update plugins individually or in small groups.
5. Update the theme.
6. Update WordPress Core.
7. Test the website.
8. Clear the cache.

For simple websites, several updates can be carried out together. For important websites, it is safer to perform updates step by step and test after each major update.

4. Understand automatic updates

WordPress supports automatic background updates. These were introduced to improve security and maintenance. By default, many websites mainly have minor maintenance, security and translation updates enabled automatically. Automatic updates can affect the core, plugins, themes and translations.

Automatic updates are useful for:

• small security updates,
• maintenance updates,
• translations,
• well-maintained simple websites,
• less critical plugins with low risk.

Caution is advisable for:

• WooCommerce,
• page builders,
• security plugins,
• form plugins,
• membership plugins,
• multilingual websites,
• custom-coded themes.

For business-critical websites, a controlled update strategy is often better than fully automatic updates for all components.

5. Distinguish between small updates and major version jumps

Not every update has the same risk. Small security and maintenance updates are usually less problematic than major version jumps with new features or technical changes.

Examples:

• Small update: Security or maintenance update within the same major version.
• Larger update: New WordPress major version or major plugin version jump.
• Critical update: WooCommerce, page builders, theme frameworks or security plugins.
• Server-related update: PHP version or database version.

The larger the change, the more important backup, staging and functional testing become.

6. Perform plugin updates correctly

Plugins are one of the most common causes of WordPress problems after updates. This is because plugins can intervene deeply in WordPress: forms, SEO, caching, shops, security, multilingual functionality, user roles or payments.

Proceed carefully with plugin updates:

1. Create a backup.
2. Check the changelog or update notes if the plugin is important.
3. Do not blindly update all plugins at once.
4. Test central functions after important updates.
5. Clear the cache.
6. In case of errors, specifically roll back the plugin or restore the backup.

You should especially test after updates of:

• WooCommerce,
• form plugins,
• SEO plugins,
• caching plugins,
• security plugins,
• page builders,
• multilingual plugins,
• membership or LMS plugins.

7. Theme updates and child themes

Theme updates are important because themes contain not only the design, but often also templates, scripts and functions. If you have made changes directly in the parent theme, they may be overwritten during the update.

Therefore:

• Do not make direct changes to parent theme files.
• Use a child theme for code and template customisations.
• After theme updates, check design, menus, widgets and mobile display.
• For WooCommerce themes, also check shop templates.

If a theme update contains major layout changes, test it first in staging.

8. Update WordPress Core

WordPress Core is the actual system. Core updates can include security fixes, bug fixes, new features and technical changes.

WordPress describes two main update methods: the one-click update process in the dashboard and the manual update process if the automatic method does not work or if you need more control.

Before a core update, you should check:

• Is a backup available?
• Are important plugins compatible with the new version?
• Is the PHP version suitable?
• Has the change been tested in staging?
• Are there notices in the WordPress dashboard?
• Are there known problems with your theme or page builder?

9. Manual updates via cPanel or FTP

Manual updates are only necessary if the dashboard is not accessible, an update has failed or you deliberately want to update via files. This method is advanced and should be carried out carefully.

Basic rule: replace WordPress core files, but do not delete your individual content.

You should especially not delete or overwrite:

• wp-config.php,
• wp-content/,
• your own uploads,
• your own themes,
• your own plugins,
• custom server configuration files without checking them.

The WordPress documentation warns that an upgrade can affect all files and folders belonging to the main WordPress installation. If core files have been modified directly, these changes will be lost during the update.

10. Updates via Softaculous

If WordPress was installed via Softaculous, updates and, in some cases, automatic updates can also be managed via Softaculous. This is particularly practical if you want to see several installations centrally in cPanel.

Depending on the configuration, Softaculous can help with:

• WordPress core updates,
• plugin updates,
• theme updates,
• automatic updates,
• backups before changes,
• staging copies.

Nevertheless, you should choose your update strategy consciously. Fully automatic updates of all plugins are convenient, but can trigger unexpected problems with complex websites.

11. Test correctly after updates

An update is only complete once the website has been tested. Do not rely only on the message “Update successful”.

After updates, check:

• home page,
• important subpages,
• blog or knowledgebase,
• contact form,
• menu and footer,
• mobile view,
• login and dashboard,
• media library,
• SEO plugin and sitemap,
• cookie banner,
• tracking or analytics, if used,
• cart and checkout for WooCommerce.

After updates, clear all relevant caches: WordPress cache, server cache, CDN cache and browser cache.

12. Fix errors after updates

If an error occurs after an update, proceed systematically. Common problems include plugin conflicts, PHP compatibility, cache problems or outdated theme files.

First steps:

1. Clear the cache.
2. Test the website in an incognito window.
3. Write down the error message.
4. Identify the plugin or theme updated most recently.
5. Check the PHP version.
6. Check error logs in the hosting account.
7. Reproduce the problem in staging.
8. Restore the backup if necessary.

If the dashboard is no longer accessible, plugins can be temporarily disabled via the file manager or FTP by renaming the plugin folder. However, this step should only be carried out with caution.

13. Maintenance mode remains stuck after an update

During an update, WordPress briefly creates a file called .maintenance. This causes visitors to see a maintenance notice. Normally, this file is automatically removed after a successful update.

If an update is interrupted, the website can remain stuck in maintenance mode. In this case, the file .maintenance in the WordPress root directory can be deleted manually. Afterwards, check whether the update was completed fully.

14. Keep an eye on the PHP version

Updates of WordPress, themes and plugins are often connected to the PHP version. New plugin versions may require modern PHP versions. Old plugins, on the other hand, can have problems with new PHP versions.

Check regularly:

• Which PHP version is currently running?
• Does WordPress support this version?
• Are the theme and plugins compatible?
• Are there warnings in Site Health?
• Has a PHP change been tested in staging?

At CURIAWEB, depending on your hosting package, you can conveniently manage the PHP version in cPanel.

15. Update plan for professional websites

For professional websites, a fixed maintenance plan is worthwhile. This ensures updates are not forgotten, but also not carried out in an uncontrolled way.

A possible plan:

• Weekly: Check available updates.
• Monthly: Update plugins and themes in a controlled way.
• Before every major update: Backup and staging test.
• After every update: Functional test and cache clearing.
• Quarterly: Remove plugins and themes that are no longer needed.
• Regularly: Check PHP version and Site Health.

For websites with high requirements, a maintenance contract can be useful.

16. SEO and updates

Updates are not a direct SEO trick, but they support a stable, secure and high-performing website. An outdated or faulty website can affect loading time, user experience, indexing and trust.

After updates, you should check SEO-relevant areas:

• permalinks work,
• sitemap is generated correctly,
• SEO titles and meta descriptions remain intact,
• no unwanted noindex,
• structured data remains valid,
• internal links work,
• contact and conversion pages work,
• PageSpeed and Core Web Vitals do not deteriorate noticeably.

17. GEO: freshness as a trust signal

GEO, meaning Generative Engine Optimization, indirectly benefits from up-to-date technology. AI-supported search and answer systems prefer reliable, accessible and trustworthy content. A well-maintained website with functioning pages, current information and stable technology is the better foundation for this.

Updates help indirectly through:

• fewer technical errors,
• better availability,
• up-to-date security basis,
• stable content display,
• functioning structured data,
• better user experience.

Common mistakes with WordPress updates

• No backup: Errors cannot be reversed quickly.
• All plugins updated at once: In case of errors, the cause is hard to find.
• No staging tests: Problems are only discovered on the live site.
• Cache not cleared: Old files or layouts remain visible.
• Parent theme changed directly: Custom adjustments are lost during the update.
• WooCommerce not tested: Checkout or payment methods do not work correctly.
• PHP version ignored: New or old plugins cause compatibility errors.
• Manual update carried out incorrectly: wp-content or wp-config.php is damaged.

Recommended procedure

1. Check Site Health: Are there already errors or warnings?
2. Create a backup: Back up files and database completely.
3. Use staging: Test updates first for important websites.
4. Read update notes: Especially for WooCommerce, page builders and security plugins.
5. Update plugins step by step: Test critical plugins individually.
6. Update themes: Check design and child theme.
7. Update WordPress Core: Use the dashboard or Softaculous.
8. Update translations: Keep backend and frontend texts up to date.
9. Test the website: Check forms, shop, menus, mobile view and SEO.
10. Clear cache: Take all relevant cache layers into account.

Frequently asked questions about WordPress updates

Why are WordPress updates important?

Updates close security vulnerabilities, fix bugs, improve compatibility and can provide new features.

Where do I find updates in WordPress?

In the WordPress dashboard under Dashboard > Updates. There you can see updates for WordPress Core, plugins, themes and translations.

Should I enable automatic updates?

Small security and maintenance updates are often useful. For complex websites, shops or critical plugins, automatic updates should be configured deliberately and tested.

Do I need to create a backup before every update?

Before major updates, yes. Especially for core, theme, WooCommerce, PHP or important plugin updates, a current backup should be available.

What should I do if an update damages the website?

Clear the cache, check the error message, identify the component updated most recently and restore the backup if necessary. For critical errors, CURIAWEB Support can help.

Can I update WordPress manually?

Yes, but only with caution. wp-content and wp-config.php must not be accidentally deleted or overwritten.

Why is my website stuck in maintenance mode?

An update was probably interrupted. Check in the WordPress root directory whether a file .maintenance exists and remove it only if the update is no longer running.

Are updates good for SEO?

Indirectly, yes. A secure, fast and error-free website supports user experience, crawling and technical SEO. However, updates alone do not guarantee better rankings.