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Website Security Checklist for Small Businesses

Most website security incidents trace back to a handful of missed basics, not sophisticated attacks.

M3 Engineering2 min readAugust 5, 2026

Most small business website security incidents don’t come from sophisticated targeted attacks — they come from a handful of missed basics that automated scanning tools find easily. Here’s the checklist we run.

HTTPS Everywhere, Not Just the Checkout Page

A valid SSL certificate covering the entire site — not just payment pages — is table stakes, both for security and because browsers now flag non-HTTPS sites as "not secure" to visitors.

Keep Everything Patched, Not Just the Core Platform

Plugins and third-party extensions are a more common attack vector than the core CMS itself — an outdated plugin with a known vulnerability is one of the most exploited entry points.

Enforce Strong Admin Credentials and Limit Access

Unique, strong passwords and two-factor authentication on every admin account, plus removing access for anyone who no longer needs it, closes off the most common way sites get compromised.

Maintain Real, Tested Backups

A backup that's never been tested for restoration isn't a real safety net — schedule regular backups and periodically confirm they actually restore correctly.

Monitor for Unauthorized Changes

File integrity monitoring or a security plugin that alerts on unexpected file changes catches a compromise early, before it escalates into something customers notice.

Frequently Asked Questions

How often should a security audit happen?

An annual audit is a reasonable baseline for most small business sites, with more frequent checks for anything handling payment or sensitive customer data.

What should we do if we suspect a breach?

Change all admin credentials immediately, restore from a known-clean backup if available, and audit for how the breach happened before bringing the site back online — restoring without understanding the cause just invites a repeat.

READY WHEN YOU ARE

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Custom software, mobile apps and websites for businesses across the USA and Canada. Building since 2012.

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