How to Protect Against XSS with a Layered Approach

View profile for Ali Shihab

Bug Hunter | Penetration Tester | CEH

Understanding XSS Protection Across an Entire Domain Cross-Site Scripting (XSS) is one of the most common web vulnerabilities that can impact user security and trust. But with a layered security approach, it’s possible to make XSS nearly impossible to exploit. Here’s how modern web applications protect themselves at every step: ➡️ Input Sanitization – filtering dangerous inputs before they reach the server. ➡️ Output Encoding – ensuring injected code is displayed as text, not executed. ➡️ Content-Security-Policy (CSP) – restricting script execution to trusted sources only. ➡️ File Upload Protection – sanitizing or converting uploaded files to safe formats. ✅ When these defenses are applied at the domain-wide level, every page and endpoint is secured by default. 📌 Takeaway: XSS protection is not just one control—it’s a combination of multiple layers working together to safeguard users and data. #CyberSecurity #XSS #WebSecurity #AppSec #CSP #Infosec

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