If you're concerned about securing your website from user-uploaded content, think again! In our previous installment of the security series, we covered permission settings. Now it's time to tackle the challenges of displaying and serving user-submitted files. To do this safely, you'll need to create a separate upload directory for each user, filter uploaded files for malware, and limit public access to prevent malicious code from spreading. The consequences of not doing so can be catastrophic - from identity theft to terrorism financing. But don't worry, I've got some practical advice on how to implement these measures and keep your website secure. In this article, we'll explore the best practices for handling user-uploaded content, including server-side rendering engine disabling and client-side protections using Content Security Policy (CSP).

Protect Your Website from Client-Side Maliciousness: Don't Let Hackers Win! In part 3 of our "Securing Your Website" series, we're diving into the client-side defenses against malicious user input. In part 1, we covered permissions and in part 2, how to handle user uploads on the server side. Now, let's focus on keeping your website safe from JavaScript injection attacks. Learn how to limit JavaScript injection in your webpage code using JavaScript itself, and discover why it's not foolproof. We'll also explore the importance of server-side filtering to catch any sneaky attempts that might slip through. But what happens when even these defenses fail? That's where Content Security Policy (CSP) comes in - a powerful tool to shield your website from script injection attacks. In this post, we'll delve into how CSP can be used to secure your website and prevent malicious scripts from executing on your site. We'll also explore the trade-offs of implementing strict CSP policies that might block essential third-party analytics, tracking, and ads. Don't miss out on the next step in securing your website - read on to learn more!