Marc Armengou

Security Hardener is inspired by the official WordPress hardening guide (Advanced Administration / Security / Hardening). It uses the platform’s standard functions and does not override core. Applies a prudent set of defenses:
<ul>
<li>Security headers: <code>X-Frame-Options</code>, <code>X-Content-Type-Options</code>, <code>Referrer-Policy</code>, <code>Permissions-Policy</code>, <code>COOP/CORP</code>. </li>
<li>HSTS (optional; HTTPS only). </li>
<li>Basic nonce-based CSP (optional; requires testing). </li>
<li>Disable XML-RPC and pingbacks (optional; enabled by default). </li>
<li>Hide the WordPress version in the <code><head></code>. </li>
<li>Block user enumeration via <code>/?author=</code> by returning 404. </li>
<li>Generic login errors (prevents information leakage). </li>
<li>IP-based login rate limiting with transients (configurable threshold and window). </li>
<li>Restrict the REST API to authenticated users, with a minimal allowlist for oEmbed/index.</li>
</ul>
<blockquote>
⚠️ Important: The restrict REST API option and CSP can affect integrations and plugins. Test it in staging first.
</blockquote>
Privacy: the plugin does not send data to external services or create new tables. It only uses transients to count failed login attempts.

Security Hardener

Basic hardening: secure headers, enumeration blocking, generic login errors, IP-based rate limiting, and optional restriction of the REST API.

Dozty

A basic security plugin for WordPress 4.x, 5.0 or higher. You can selectively disable unused features in WordPress core, and this plugin will help you to remove unnecessary information to be disclosed to attackers. You can find more details in the User Manual.
Basic WP Security Hardening: 
– Remove WP Version Details 
– Disable XMLRPC 
– Disable Pingback 
– Disable Windows Live Writer 
– Disable RSS Feeds 
– Disable JSON & REST API 
– Enable Security Headers (X-Frame-Options, X-XSS-Protection, X-Content-Type-Options) 
– Remove PHP Version Header
Optional Settings: 
– Remove HTML Comment Tags 
– Trim HTML Response
Custom Login URL: 
– Customize Login URL 
– Customize Login Logo URL 
– Enforce HTTPS Login

DozWPSecure

A basic security plugin for WordPress 4.x, 5.0 or higher. You can selectively disable unused features in WordPress core...

Security Hardener vs DozWPSecure