How to Perform a WordPress Security Audit

Why Security Audits Matter

A security audit is a systematic evaluation of your WordPress site's security posture. Regular audits help you identify vulnerabilities, assess your current protection measures, and prioritize security improvements before attackers exploit weaknesses.

Think of security audits as regular health checkups for your website. Even if everything seems fine, underlying issues may exist that only a thorough examination reveals.

Pre-Audit Preparation

Gather Information

Before starting, collect essential information:

• WordPress version and update history
• Complete list of plugins and themes
• User accounts and their roles
• Hosting environment details
• Previous security incidents
• Current security measures in place

Create a Backup

Always create a full backup before any security testing. Some audit activities might accidentally affect site functionality.

Notify Stakeholders

If you're not the only person managing the site, inform other administrators about the audit to avoid confusion.

WordPress Core Assessment

Version Check

Verify you're running the latest WordPress version. Check both the dashboard and compare files against official WordPress releases.

Core File Integrity

Compare your WordPress core files against clean copies. Any modifications could indicate compromise or accidental corruption.

WordPress Configuration

Review wp-config.php for security settings:

• Strong database credentials
• Unique security keys and salts
• Appropriate debug settings
• File editing disabled

Plugin and Theme Audit

Update Status

Check that all plugins and themes are updated to their latest versions. Outdated extensions are common attack vectors.

Abandoned Software

Identify plugins and themes that haven't been updated in over a year. These may have unpatched vulnerabilities.

Remove Unused Items

Delete inactive themes and plugins. Even deactivated code can contain vulnerabilities.

Source Verification

Confirm all plugins and themes come from legitimate sources (WordPress.org, official vendors). Watch for nulled or pirated software.

Known Vulnerabilities

Check your plugins against vulnerability databases like WPScan Vulnerability Database or Wordfence Intelligence.

User Account Review

Account Inventory

Review all user accounts:

• Remove accounts for former team members
• Identify accounts that shouldn't have admin access
• Look for suspicious accounts you don't recognize

Password Strength

Verify password policies are enforced. Consider requiring password changes for accounts with weak or old passwords.

Role Assignment

Ensure users have only the permissions they need. Apply the principle of least privilege.

Two-Factor Authentication

Confirm 2FA is enabled for all administrator accounts.

File System Analysis

Permission Check

Verify file and directory permissions:

• Files: 644
• Directories: 755
• wp-config.php: 400 or 440

Suspicious Files

Look for files that shouldn't exist:

• PHP files in uploads directory
• Files with unusual names
• Recently modified core files
• Hidden files (starting with .)

Upload Directory Review

Check the uploads folder for malicious files disguised as images or documents.

Database Security

Database User Privileges

Verify the WordPress database user has only necessary permissions, not full database access.

Table Prefix

Check if you're using a non-default table prefix to prevent automated SQL injection attacks.

Suspicious Content

Search the database for:

• Base64-encoded content
• Malicious scripts in posts
• Spam links in content
• Unknown administrator accounts

Security Feature Assessment

Login Security

• Login attempt limiting enabled?
• Custom login URL configured?
• CAPTCHA on login form?

Firewall Status

Verify your web application firewall is active and properly configured.

Malware Scanning

Run a comprehensive malware scan using multiple tools for thorough coverage.

Backup Verification

Confirm automated backups are running and test restoration capability.

External Security Testing

Online Scanners

Use external scanning tools:

• Sucuri SiteCheck
• VirusTotal
• Google Safe Browsing
• SSL Labs

Penetration Testing

For high-value sites, consider professional penetration testing to identify vulnerabilities that automated tools miss.

Documentation and Reporting

Create an Audit Report

Document your findings:

• Issues discovered
• Severity ratings
• Remediation recommendations
• Timeline for fixes

Action Plan

Prioritize fixes based on risk and create a schedule for addressing each issue.

Conclusion

Regular security audits are essential for maintaining WordPress security. Conduct comprehensive audits quarterly and quick assessments monthly to stay ahead of potential threats.