Install
This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.
Install straight from GitHub with WP-CLI:
wp plugin install https://github.com/runthis/site-security-headers/archive/refs/heads/master.zipNo built-in updater. New versions won't appear under Dashboard → Updates. Install new releases yourself, or let Git Updater track the repository.
Wordpress Site Security Headers
This is a WordPress plugin that checks your WordPress website for common headers associated with security. This plugin is opinionated and these things will not directly apply to every situation, so it is best to analyze individual applications to determine your own best path forward.

| Header name | Expects |
|---|---|
| strict-transport-security | max-age >= 31536000 |
| referrer-policy | no-referrer no-referrer-when-downgrade origin origin-when-cross-origin same-origin strict-origin strict-origin-when-cross-origin |
| permissions-policy | Just expects this to exist in some way |
| content-security-policy | Minimum of: default-src 'none' |
| x-frame-options | deny sameorigin allow-from |
| x-content-type-options | nosniff |
| x-xss-protection | 0 1 (informs you that it is deprecated and recommends CSP) |