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Protect your web applications from JavaScript vulnerabilities with essential security practices. Learn how to prevent attacks, sanitize inputs, and secure your code with expert-recommended checklists.
🔗 Read more: JavaScript Security: How to Mitigate the Top Risks Now
You Should Know:
Here are some practical commands and code snippets to help you secure your JavaScript applications:
1. Input Sanitization with DOMPurify:
Install DOMPurify to prevent XSS attacks:
npm install dompurify
Use it in your code:
[javascript]
import DOMPurify from ‘dompurify’;
const cleanInput = DOMPurify.sanitize(dirtyInput);
[/javascript]
2. Content Security Policy (CSP):
Add a CSP header to your server to restrict resource loading:
[http]
Content-Security-Policy: default-src ‘self’; script-src ‘self’ https://trusted.cdn.com;
[/http]
3. Prevent Clickjacking:
Add the `X-Frame-Options` header to your server:
[http]
X-Frame-Options: DENY
[/http]
4. Secure Cookies:
Set the `HttpOnly` and `Secure` flags for cookies:
[javascript]
res.cookie(‘session’, ‘value’, { httpOnly: true, secure: true });
[/javascript]
5. Use HTTPS:
Ensure your server enforces HTTPS:
<h1>For Nginx</h1>
server {
listen 443 ssl;
ssl_certificate /path/to/cert.pem;
ssl_certificate_key /path/to/private.key;
}
6. Audit Dependencies:
Regularly check for vulnerabilities in your npm packages:
npm audit
7. Prevent CSRF Attacks:
Use CSRF tokens in your forms:
<input type="hidden" name="_csrf" value="<%= csrfToken %>">
What Undercode Say:
JavaScript security is critical for protecting web applications from vulnerabilities like XSS, CSRF, and clickjacking. By implementing input sanitization, CSP headers, secure cookies, and HTTPS, you can significantly reduce risks. Regularly auditing dependencies and using tools like DOMPurify further strengthens your defenses. Always stay updated with the latest security practices to keep your applications safe.
For more advanced techniques, explore resources like OWASP JavaScript Security Cheat Sheet.
Related Commands:
- Check for open ports:
sudo netstat -tuln
- Monitor network traffic:
sudo tcpdump -i eth0
- Scan for vulnerabilities:
nmap -sV --script=vuln target.com
- Secure file permissions:
chmod 600 sensitive-file.txt
- Encrypt files with GPG:
gpg -c file.txt
Stay vigilant and keep your systems secure!
References:
Reported By: Housenathan Javascript – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
