Disable the Theme and Plugin File Editors
Turns off the built-in Theme File Editor and Plugin File Editor screens, so a hijacked admin account cannot inject code through them.
WPIDE Team 6 installs
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.