Running an eCommerce store means handling valuable information, including customer names, addresses, passwords and payment details. That makes online stores attractive targets for cybercriminals.
A successful attack can disrupt sales, expose sensitive data and damage customer trust. Fortunately, you can significantly reduce the risk by following a layered security strategy. Here are the most important steps you can take to protect your eCommerce site.
1. Keep Your Platform and Plugins Updated
Outdated software is one of the most common entry points for attackers. Security vulnerabilities may exist in your eCommerce platform, content management system, themes, extensions and server software.
Install security updates as soon as they become available. Remove unused plugins and themes, and only download software from reputable developers. Where possible, enable automatic security updates and test major updates in a staging environment before deploying them.
If you’re a little more tech-savvy, sites such as OpenCVE list vulnerabilities to each platform, plugin, app, and extension as they occur. This site is great for staying in-touch with any potential issues which may occur with your site.
2. Use HTTPS Across Your Entire Site
HTTPS encrypts information exchanged between your website and its visitors. This helps protect login credentials, personal details and checkout information from interception.
Install a valid SSL/TLS certificate and redirect all HTTP traffic to HTTPS. You should also check for mixed content, which occurs when a secure page loads scripts, images or other resources over an unsecured connection.
HTTPS is essential for security and customer confidence, but it does not protect a site from every type of attack. It should be one part of a broader security strategy.
3. Require Strong Passwords and Multi-Factor Authentication
Compromised administrator accounts can give attackers extensive control over an online store. Protect privileged accounts with long, unique passwords and multi-factor authentication.
Apply these practices to:
- Store administrator accounts
- Hosting and domain accounts
- Business email accounts
- Payment-provider dashboards
- Database and server access
- Third-party tools connected to your store
Never share administrator credentials between employees. Give each person an individual account so access can be changed or removed when necessary.
4. Limit Access and User Permissions
Not every team member needs full administrative access. Follow the principle of least privilege by giving users only the permissions required to do their jobs.
Review accounts regularly and immediately disable access for former employees, contractors and agencies. Limit the number of administrators, protect database credentials and restrict server access to authorised users.
5. Choose Secure Hosting
Your hosting environment plays an important role in your store’s security. Select a provider that offers appropriate protections for eCommerce websites, such as:
- Malware scanning
- Network monitoring
- Web application firewall support
- Automated backups
- DDoS protection
- Secure access controls
- Timely server patching
- Responsive security support
If you use shared hosting, understand how your provider isolates customer accounts. Growing or high-traffic stores may benefit from managed cloud or dedicated hosting with stronger security controls.
If you’re using a SaaS solution such as Shopify or Adobe Commerce as a Cloud Service, these services are largely managed for you, however at times, do still experience security issues, especially with the advent of AI bots.
6. Install a Web Application Firewall
A web application firewall, or WAF, filters suspicious traffic before it reaches your store. It can help block common threats such as SQL injection, cross-site scripting, malicious bots and repeated login attempts.
A WAF is particularly valuable when combined with rate limiting and bot management. These controls can reduce credential-stuffing attacks, fake account creation, payment fraud and automated attempts to find vulnerabilities.
7. Use a Trusted Payment Provider
Avoid storing sensitive card details on your own systems unless there is a genuine business requirement and you have the necessary security expertise.
Use a reputable payment gateway that supports tokenisation and secure hosted payment components. Make sure your checkout process follows the Payment Card Industry Data Security Standard requirements that apply to your business.
Using a payment provider can reduce your exposure, but it does not remove all responsibility. Your website, integrations and administrative accounts must still be properly secured.
8. Protect Customer Accounts
Customer accounts are frequent targets because people often reuse passwords across multiple services. Attackers can test stolen credentials against your login page and use successful logins for fraud.
Defensive measures may include:
- Rate limiting login attempts
- Detecting unusual login activity
- Blocking known malicious bots
- Offering multi-factor authentication
- Checking new passwords against known breach lists
- Requiring reauthentication before sensitive account changes
- Notifying customers about suspicious logins or profile changes
Avoid relying solely on security questions, as their answers may be easy to discover or guess.
9. Back Up Your Store Regularly
Reliable backups can help you recover from malware, ransomware, accidental deletion and failed software updates.
Back up your website files, database, product information, customer records and configuration settings. Keep at least one backup separate from your production environment and protect it with strong access controls.
Most importantly, test the restoration process. A backup is only useful if it is complete, uncompromised and recoverable.
Additionally, don’t rely on storing everything you have on your server or in your ERP.
10. Monitor Your Website for Suspicious Activity
Security monitoring helps you identify attacks before they cause extensive damage. Track events such as:
- Repeated failed login attempts
- Unexpected administrator accounts
- Unauthorised file changes
- Unusual order or refund activity
- Suspicious database queries
- Sudden traffic spikes
- Changes to payment settings
- Disabled security tools
Set up alerts for high-risk events and keep audit logs long enough to support an investigation. Logs should be protected so attackers cannot easily alter or delete them.
11. Scan and Test Your Site
Run regular vulnerability scans and malware checks. After major changes, test your storefront, checkout, APIs and third-party integrations for security issues.
Larger or higher-risk stores should consider periodic penetration testing by qualified professionals. Responsible testing can reveal weaknesses that automated tools may miss.
Only perform security testing on systems you own or have explicit permission to assess.
12. Secure Third-Party Integrations
Every plugin, analytics tool, marketing platform and logistics integration can expand your attack surface.
Before connecting a service, review the permissions it requests, how it handles customer data and whether the provider has a credible security program. Remove integrations you no longer use, rotate access keys periodically and never place secret credentials in public source code.
13. Train Your Team to Recognise Threats
Technical safeguards cannot prevent every incident. Employees may be targeted with phishing emails, fake support calls, malicious attachments or fraudulent requests to change payment details.
Provide regular security awareness training and establish a clear process for reporting suspicious activity. Employees should verify unusual requests through a trusted second channel before taking action.
14. Create an Incident Response Plan
Even a well-protected business may experience a security incident. Prepare a written plan that explains how your team will contain the threat, preserve evidence, restore services and communicate with affected parties.
Include contact details for your hosting provider, payment processor, security specialists, legal advisers and cyber insurer. Review applicable breach-notification and privacy obligations with qualified professionals.
Final Thoughts
Protecting an eCommerce site is an ongoing process rather than a one-time setup. Start with software updates, strong authentication, secure hosting, controlled access, reliable backups and continuous monitoring.
Layering these protections makes it more difficult for attackers to compromise your store and helps you respond faster if something goes wrong.
Unfortunately with the rising advent of AI-technologies, retailers are going to need to be more active in their efforts to mitigate security issues.
For many years, security was a secondary thought for a lot of retailers, however today, you simply cannot afford to take the risk.
If you need assistance securing your eCommerce website, understanding where you’re vulnerable, and how you can derisk your digital business; feel free to reach out to the OSE team.
