Security guides your team can ship this week

HSTS (HTTP Strict Transport Security) is a single header that eliminates an entire class of SSL stripping attacks. This guide explains how it works, how to configure it safely, and what you must check before enabling the preload flag.

A practical GDPR compliance checklist for website owners. 12 actionable steps covering cookie consent, privacy policies, data protection, and security.

File upload vulnerabilities are a leading cause of remote code execution in web applications. This guide covers MIME validation, extension whitelisting, storage isolation, and CSP controls to make file uploads safe.

Seven simple tests to verify any website's security in minutes. No technical background needed.

Content Security Policy is the most powerful browser security mechanism available — and the most commonly misconfigured. This guide walks through every directive with real-world examples, shows you how to build a CSP that doesn't break your site, and explains how to use report-uri to catch violations before they become problems.

HTTP security headers are free, fast to deploy, and fix a wide range of browser-level vulnerabilities. This guide covers all seven essential headers, what each one does, how to add them to your server, and how to verify they are working.

Learn how to configure Content Security Policy headers step by step. Prevent XSS attacks, data injection, and clickjacking with real-world examples.

A website security score gives you a single number that summarises how well your site is protected. This guide breaks down how the score is calculated, what the different ranges mean, and which fixes will move the needle fastest.

Squarespace handles more security infrastructure than most platforms — but understanding the boundary between what it manages and what you own is essential for a truly secure site.