Lock Registration and Default Role Settings
Forces "Anyone can register" and the default new user role to fixed values in code, so an attacker or a mistake cannot open admin-level sign-ups.
Snippet Library
Security snippets for WordPress
Snippets that harden WordPress: turn off XML-RPC, hide the version number, stop user enumeration, add security headers and block risky uploads. Small, reviewable changes for site owners who want fewer attack points without a heavy security plugin.