A practical guide to adding HTTP security headers to your WordPress site using .htaccess, nginx config, and PHP. Covers Content Security Policy (CSP) without breaking Gutenberg, HSTS with preload submission, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy — plus how to test with securityheaders.com and Mozilla Observatory.
Three high-severity WordPress vulnerabilities are under active exploitation right now — Ninja Forms file upload, Kali Forms, and Perfmatters file deletion. Here is what got disclosed between April 6 and April 18, who is affected, and the exact steps to take in the next 10 minutes if you run any of them.
