Every 39 seconds, a cyberattack happens somewhere on the internet. WordPress powers over 43% of all websites, making it the single biggest target for automated hacking tools. But here’s the good news: most successful attacks exploit simple, preventable mistakes.
Here are the seven most common WordPress security mistakes — and how to fix each one.
Mistake #1: Using the Default Admin Login URL
Every WordPress site in the world has its login page at /wp-admin or /wp-login.php. Automated bots know this and probe it constantly. By leaving your login at the default URL, you’re making it trivially easy for attackers to find and target your authentication system.
The fix: Use a custom admin URL. Trusti Security includes a built-in URL masking feature that moves your login page to a path only you know. Bots hitting the default URL get a 404 and move on.
Mistake #2: No Brute Force Protection
Without limits on login attempts, attackers can try millions of username/password combinations until they find one that works. This is called a brute force attack, and WordPress has no native protection against it.
The fix: Enable brute force protection. Trusti Security automatically locks out IPs that exceed your configured failed login threshold and sends you an instant alert via email, Slack, Telegram, or Pushover when an attack is detected.
Mistake #3: No Two-Factor Authentication
Passwords get compromised. They’re reused across sites, stolen in data breaches, guessed through brute force, or phished. A password alone is a single point of failure for your entire admin access.
The fix: Enable 2FA. Trusti Security includes TOTP-based two-factor authentication compatible with Google Authenticator, Authy, and Microsoft Authenticator. Even if your password is compromised, attackers still can’t log in without the time-sensitive second factor.
Mistake #4: Ignoring Plugin and Theme Vulnerabilities
The vast majority of WordPress compromises happen through vulnerable plugins and themes, not through WordPress core itself. A single outdated plugin can give an attacker complete access to your site — even if everything else is locked down.
The fix: Run active vulnerability scanning. Trusti Security’s vulnerability scanner checks your installed plugins, themes, and WordPress core against a live vulnerability database. You can run a manual scan at any time, and automated scheduled scans keep you informed without requiring manual effort.
Mistake #5: Missing Security Headers
HTTP security headers protect your visitors from a range of attacks including clickjacking, cross-site scripting (XSS), and protocol downgrade attacks. WordPress doesn’t set these headers by default, leaving your site and users exposed to these browser-level vulnerabilities.
The fix: Configure security headers. Trusti Security handles X-Frame-Options, X-XSS-Protection, HSTS, Content Security Policy, and Referrer Policy — all configurable without touching your server configuration files.
Mistake #6: Using Breached Passwords
Billions of passwords from past data breaches are publicly available in compiled databases. Attackers use these for credential stuffing attacks — trying known breached passwords against WordPress login pages at scale. If your users have ever reused a password that appeared in a breach, your site is at risk.
The fix: Enable pwned password detection. Trusti Security integrates with the Have I Been Pwned API to check passwords against known breach databases when users log in. If a compromised password is detected, the user sees an admin notice prompting them to change it immediately. Your actual password is never transmitted — only the first few characters of its hash are sent to the API.
Mistake #7: No Activity Logging
When something goes wrong on your site — unauthorized settings changes, suspicious new user accounts, unexpected plugin installations — do you have a record of what happened and when? Most WordPress sites don’t. Without an activity log, investigating a security incident means guessing.
The fix: Enable admin activity logging. Trusti Security maintains a detailed audit trail of all administrative actions: logins, user management, plugin changes, settings modifications — with timestamps and IP addresses for every entry. When something happens, you’ll know exactly what, when, and who.
One Plugin, All Seven Fixes
Every mistake on this list is addressed directly by Trusti Security. Custom admin URL, brute force protection, 2FA, vulnerability scanning, security headers, pwned password detection, and activity logging — all in one plugin, working together to give your WordPress site the security posture it needs.