1. Not Using Proper Input Validation
- When you don't validate user input, attackers can inject malicious code into your site.
- For example: /xss
2. Insecure Session Management
- Improper handling of sessions can allow hackers to take over user accounts.
- Use HTTPS and regenerate session IDs on each request.
3. Incomplete HTML Form Handling
- You should validate all form inputs before processing them.
- Ignore empty fields or fields with invalid values.
4. Cross-Site Scripting (XSS)
- XSS attacks occur when an attacker injects malicious scripts into your site.
- You need to sanitize all user inputs and re-output them properly.
5. SQL Injection Vulnerabilities
- SQL injection happens when user input is not properly sanitized.
- Your database queries should be prepared statements.
6. Improper CSRF Protection
- Cross-site request forgery attacks can trick users into performing actions they don't intend.
- You should implement anti-CSRF tokens in every POST request.
7. Broken Authentication
- Weak authentication mechanisms can lead to unauthorized access.
- Implement strong password policies and two-factor authentication where possible.
8. Security Misconfiguration
- Many websites have misconfigured servers, allowing access to sensitive data.
- Make sure all server configurations are correct and secure.
9. Insecure API Calls
- Insecure API calls can expose your application to vulnerabilities.
- Only call APIs that are marked as secure and have proper authentication.
10. Lack of Regular Security Audits
- Regular security audits help identify and fix vulnerabilities early.
- Consider hiring a third-party security auditor for comprehensive checks.