What is a CMS?

The system your website is built on, like WordPress, Shopify or Squarespace.

A content management system lets you edit pages without coding. WordPress runs about 40 percent of websites, which also makes it the most attacked. Shopify, Wix and Squarespace are hosted, so the company updates them for you.

Knowing your CMS tells us which guides and vulnerability alerts apply to you.

What to do

Self-hosted WordPress needs updates from you or your web person; hosted builders do not.
Keep the number of plugins small; each one is another thing to keep updated.