Top 5 Common Website Vulnerabilities and How to Fix Them
Top 5 Common Website Vulnerabilities and How to Fix Them
Website vulnerabilities are like open doors for hackers. Learn how to identify and fix the most common issues to keep your site secure.
1. SQL Injection
SQL Injection is one of the oldest and most dangerous vulnerabilities. Attackers inject malicious SQL commands to access or manipulate your database.
How to fix it:
- Use parameterized queries and prepared statements.
- Sanitize user inputs to prevent unexpected commands.
- Limit database permissions for critical operations.
2. Cross-Site Scripting (XSS)
XSS attacks inject malicious scripts into your website, potentially stealing user data or hijacking user sessions.
How to fix it:
- Escape and validate user inputs.
- Implement a Content Security Policy (CSP).
- Use secure frameworks that handle XSS mitigation automatically.
3. Insecure File Uploads
Allowing users to upload files without proper validation can lead to malicious files being executed on your server.
How to fix it:
- Restrict file types and validate uploads.
- Store uploaded files outside the root directory.
- Scan uploaded files for malware or threats.
4. Weak Authentication
Weak authentication methods, such as simple passwords, make it easy for attackers to gain unauthorized access.
How to fix it:
- Enforce strong password policies.
- Implement Multi-Factor Authentication (MFA).
- Use secure password hashing algorithms like bcrypt.
5. Outdated Software
Using outdated CMS, plugins, or libraries can expose your site to known vulnerabilities.
How to fix it:
- Regularly update your CMS, plugins, and software dependencies.
- Remove unused plugins or themes to reduce attack surfaces.
- Monitor vulnerability reports for the software you use.
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