Why Updates Matter
The Three Types of WordPress Updates
Why update WordPress? Updating means replacing older software with a newer version, and a WordPress site receives three main kinds of update, each with a different scope.
- Core updates change the WordPress software itself. Major releases add features and larger changes, while minor releases mostly fix bugs and security issues.
- Plugin updates change individual plugins, which add features or connections to other services.
- Theme updates change the design and template files of a theme.
Whether updates should install without review is a separate question, covered in the automatic updates article.
Why Updates Matter for Security and Stability
Updates are the main way software fixes known vulnerabilities. Once a security flaw in a popular plugin or core version is publicly described, attackers can look for sites that have not yet installed the fix. Staying current shortens that window.
Updates also fix bugs, improve compatibility with newer server software and remove code that is no longer supported. Skipping releases tends to build up risk, and a long gap can turn a routine update into a difficult one.
The Compatibility Risk of Updating
Updates can also break things. A plugin may not yet support a new core version, a theme may depend on a function that has changed, or custom code may conflict with an update. For this reason many site owners test updates on a copy of the site first and keep a current backup before updating.
Customizations are a common source of trouble. Changes made directly to a parent theme are overwritten when that theme is updated. A child theme keeps such changes separate, so they survive theme updates.
Frequently asked questions
How often should I update WordPress?
Install security and minor updates as soon as practical, and plan major updates after checking that your plugins and theme support them. Many site owners set a regular review schedule so that updates happen predictably rather than in sudden bursts.
Is it risky not to update?
Usually, yes. Outdated core software, plugins and themes are a common route for attacks because known flaws are documented. Older versions also stop receiving fixes over time. The risk from a single skipped update may be small, but it grows the longer updates are delayed.