How to Make a Website Secure: 7 Must-do Steps

The urgency is clear. Cloudflare’s 2026 Threat Report found that, across its recent telemetry, 94% of login attempts originated from bots and 63% involved credentials that had already been compromised elsewhere. The same report documented a record DDoS attack reaching 31.4 terabits per second, demonstrating how quickly modern threats can overwhelm unprotected digital infrastructure.

SmartOSC helps organisations address these risks through application security, cloud security, penetration testing, threat intelligence, vulnerability assessments, incident response, and wider cybersecurity services.

Highlights

• Website security requires multiple layers: Updates, secure access, encryption, backups, firewalls, testing, and continuous monitoring work together to reduce risk.
• Passwords alone are no longer sufficient: Multi-factor authentication, least-privilege access, and regular permission reviews are essential for administrator and business accounts.
• Security is an ongoing business process: Launching a secure website is only the beginning. Businesses must continuously patch, test, monitor, investigate, and improve their environments.

Why Website Security Matters in 2026

Understanding how to make a website secure is essential because websites now connect customers, employees, payment systems, databases, cloud services, marketing platforms, and other business-critical applications. A vulnerability in one component can provide attackers with access to sensitive information or connected systems.

The latest threat environment also shows that attacks are becoming more automated and industrialised. Cloudflare reported that DDoS attacks more than doubled during 2025, while hyper-volumetric attacks increased by 700%. Its February 2026 report documented an attack peaking at 31.4 Tbps.

The Business Risks of Poor Website Security

Poor website security can affect far more than the technical performance of a digital platform. Because websites often connect with customer accounts, payment systems, databases, cloud environments, and third-party applications, a single weakness can create operational, financial, legal, and reputational consequences across the wider organisation. Even a short disruption or limited breach may affect customer confidence, employee productivity, regulatory obligations, and revenue.

An insecure website can lead to several operational and commercial consequences:

• Data exposure: Attackers may access names, contact details, account information, financial records, credentials, or internal business data.
• Website disruption: Malware, ransomware, destructive attacks, or DDoS campaigns may make the website unavailable to customers.
• Account takeover: Stolen passwords and session tokens can allow attackers to impersonate administrators, employees, or customers.
• Fraudulent transactions: Compromised eCommerce and payment environments may be manipulated to redirect payments or steal checkout data.
• Search visibility problems: Hacked pages may contain spam, malicious redirects, or unwanted content that affects how search engines and users view the website.
• Reputational damage: Customers may lose confidence in a company that fails to protect their information or provide a reliable digital experience.
• Regulatory consequences: Businesses may face notification obligations, investigations, contractual penalties, or fines when personal information is exposed.
• Recovery expenses: Incident investigation, legal support, customer communication, system restoration, security improvements, and lost revenue can significantly increase the overall cost.

See more: The Role of Generative AI Cybersecurity in Preventing Cyber Threats

The Benefits of a Secure Website

Strong website security provides more than technical protection. It helps an organisation maintain availability, protect customer journeys, preserve data integrity, and operate with greater confidence.

A secure environment can support:

• Greater customer trust
• More reliable transactions
• Better business continuity
• Safer customer and employee accounts
• Reduced exposure to automated attacks
• Stronger compliance readiness
• Faster incident investigation
• More dependable integrations
• Safer digital expansion

Google also recommends that websites use HTTPS instead of HTTP to protect users and the website. HTTP pages may be marked as “not secure” in Chrome, which can undermine customer confidence. However, HTTPS is only one component of security and does not protect a website from application vulnerabilities, compromised accounts, or malicious plugins.

What Does a Secure Website Require?

A secure website generally requires:

• Updated software and dependencies
• Strong identity and access controls
• Encryption for information in transit and at rest
• Secure application architecture
• Protected hosting and cloud infrastructure
• Traffic filtering and DDoS protection
• Reliable backups and recovery procedures
• Vulnerability scanning and penetration testing
• Centralised logs and real-time monitoring
• A documented incident-response process
• Clear ownership across internal and third-party teams

The specific controls should reflect the website’s risk profile. An informational business website may require fewer controls than an eCommerce store, customer portal, financial application, healthcare platform, or website processing large volumes of personal data.

How to Make a Website Secure in 7 Steps

Step 1. Keep Software, Plugins, and Platforms Updated

Outdated software is one of the most avoidable sources of website risk. Content management systems, themes, plugins, frameworks, libraries, operating systems, databases, and server components may contain vulnerabilities that become publicly known after release.

CISA advises organisations to install security updates and patches promptly because outdated software can contain exploitable flaws.

Businesses should:

• Maintain an inventory of websites, servers, applications, plugins, libraries, and integrations.
• Enable automatic security updates where the operational risk is acceptable.
• Subscribe to security notifications from platform and software providers.
• Remove unused plugins, extensions, themes, user accounts, and development environments.
• Test major updates in a staging environment before production deployment.
• Replace unsupported platforms that no longer receive security patches.
• Establish deadlines for fixing critical, high, medium, and low-risk vulnerabilities.
• Review third-party dependencies for known security issues.

Updates should not be installed blindly. A controlled patch-management process should include backups, compatibility testing, approval, deployment, and post-update validation.

Organisations should also assess software supply-chain risk. The current OWASP Top 10:2025 identifies software supply-chain failures among the most critical web application security risks, reflecting the danger created by compromised dependencies, build processes, and third-party components.

Step 2. Strengthen Passwords, Authentication, and Access Control

Strong access management reduces the likelihood that stolen credentials will provide unrestricted control over the website.

Every administrator, developer, editor, hosting user, and third-party provider should receive an individual account. Shared credentials make it difficult to identify who performed an action and prevent access from being revoked safely when someone leaves a project.

Important access controls include:

• Multi-factor authentication: Require an additional verification method beyond the password, particularly for administrator, hosting, cloud, email, domain, and payment accounts.
• Phishing-resistant authentication: Where available, use security keys, passkeys, or other stronger authentication methods instead of relying only on SMS codes.
• Least-privilege access: Give users only the permissions required to perform their responsibilities.
• Role-based permissions: Separate content editing, publishing, development, billing, security, and administration privileges.
• Regular access reviews: Check accounts periodically and remove users who no longer need access.
• Password managers: Use approved tools to generate and store unique credentials securely.
• Login protection: Apply rate limiting, bot detection, suspicious-login alerts, and temporary lockouts.

CISA recommends MFA for email, file storage, remote access, and privileged accounts. It also advises organisations to use the strongest MFA option available because not all verification methods provide the same level of protection.

Access control must also be enforced within the application itself. The OWASP Top 10:2025 ranks broken access control as its leading web application risk. A user should not be able to view another customer’s information, access administrator functions, or alter restricted records by changing a URL or request parameter.

Step 3. Use HTTPS and Protect Sensitive Data

HTTPS encrypts information transmitted between the user’s browser and the website. This protection helps prevent third parties from reading or modifying information while it travels across a network.

Although the phrase “SSL certificate” remains common, current secure website connections use modern Transport Layer Security protocols.

Implementation should include:

• Obtaining a certificate from a trusted certificate authority
• Installing certificates across all website domains and subdomains
• Automatically redirecting HTTP traffic to HTTPS
• Preventing mixed content, where secure pages load insecure resources
• Renewing certificates automatically before expiration
• Enabling HTTP Strict Transport Security where appropriate
• Configuring secure and HTTP-only cookies
• Disabling outdated protocols and weak cipher configurations
• Protecting administrator, API, checkout, and login connections

Sensitive information may also require encryption at rest within databases, backups, file storage, and cloud environments. Encryption keys should be stored separately and managed through appropriate key-management procedures.

Businesses should minimise the amount of sensitive information collected and retained. Information that is not necessary for business, legal, or contractual purposes creates additional risk without delivering value.

HTTPS also should not be presented as proof that the entire website is secure. A malicious or vulnerable website can still use HTTPS. Businesses must combine transport encryption with secure development, identity controls, monitoring, and vulnerability management.

Step 4. Create Reliable Backups and Test Recovery

Backups allow the organisation to restore its website following ransomware, malicious deletion, software failure, human error, unsuccessful updates, or infrastructure problems.

A backup is useful only when it is complete, protected, recent, and capable of being restored successfully.

A strong backup programme should include:

• Automated website, database, media, configuration, and application backups
• Multiple backup copies
• Storage in separate locations
• At least one offline or immutable copy for critical systems
• Encryption for backup data
• Restricted access to backup systems
• Retention periods matching business and regulatory requirements
• Alerts when backup jobs fail
• Regular restoration tests
• Documented recovery responsibilities

CISA recommends regular automated backups, encrypted and offline copies, and tested disaster-recovery plans to support faster restoration following an incident.

Businesses should define:

• Recovery Point Objective: The maximum amount of recent data the organisation can afford to lose.
• Recovery Time Objective: The maximum acceptable period before the website or service must be restored.

An eCommerce store processing orders throughout the day may require more frequent backups and faster recovery than a relatively static corporate website.

Step 5. Use a Web Application Firewall and DDoS Protection

A Web Application Firewall monitors web traffic and applies rules to block suspicious requests before they reach the application.

A WAF may help reduce exposure to:

• Injection attempts
• Cross-site scripting
• Malicious bots
• Credential-stuffing attacks
• Path traversal
• Automated vulnerability scanning
• Unwanted traffic from suspicious sources
• Application-layer DDoS activity

The WAF should be configured around the website’s normal traffic patterns rather than left entirely on default settings. Teams should review blocked requests, false positives, newly discovered attack techniques, API traffic, and high-risk endpoints.

Additional protections may include:

• Content delivery networks
• Rate limiting
• Bot management
• API gateways
• Login challenges
• Geographic restrictions where appropriate
• Origin-server protection
• Network-layer DDoS mitigation
• Traffic anomaly detection

These controls have become increasingly important as attacks grow in scale. Cloudflare’s 2026 reporting found that DDoS attacks more than doubled during 2025 and that hyper-volumetric attacks grew by 700%.

A firewall does not fix insecure code. It adds a protective layer while developers identify and correct the underlying vulnerabilities.

Step 6. Build and Test the Website Securely

Security should be integrated into design and development rather than introduced immediately before launch.

The current OWASP Top 10:2025 includes critical risks such as broken access control, security misconfiguration, software supply-chain failures, cryptographic failures, injection, insecure design, authentication failures, software or data-integrity failures, insufficient logging, and poor handling of exceptional conditions.

A secure development process should include:

• Threat modelling during planning and architecture
• Secure coding standards
• Input validation
• Output encoding
• Parameterised database queries
• Secure API authentication
• Server-side permission checks
• Safe error handling
• Protection against cross-site request forgery
• Secure file-upload controls
• Secrets management
• Code review
• Dependency scanning
• Static and dynamic application testing
• Infrastructure configuration reviews
• Penetration testing

Development and staging environments should not contain unnecessary copies of production customer data. They should also be protected from public indexing and unauthorised access.

Security testing should occur:

• Before the first public launch
• After major platform or infrastructure changes
• Following the introduction of sensitive functionality
• After significant integrations
• Periodically based on risk
• Following a known compromise or serious vulnerability

Automated scanners can identify many known issues, but they may miss complex business-logic weaknesses. Penetration testing adds value by simulating realistic attacks and examining how several smaller weaknesses could be combined.

Step 7. Monitor Activity and Prepare an Incident-Response Plan

Organisations cannot respond effectively to attacks they cannot see. Logging and monitoring help teams identify suspicious activity, investigate incidents, and understand what happened.

Important events to record include:

• Administrator logins
• Failed authentication attempts
• Permission changes
• User creation and deletion
• Plugin or software installations
• File modifications
• Database changes
• Payment and checkout errors
• Unusual API activity
• WAF events
• Malware alerts
• Large data exports
• Configuration changes
• Backup failures

Logs should be protected from unauthorised alteration and retained for an appropriate period. High-risk alerts should be sent to a monitored channel rather than stored without review.

The incident-response plan should identify:

• Who assesses a security alert
• Who can isolate systems
• Who contacts hosting and technology providers
• Who preserves evidence
• Who communicates with customers
• Who handles legal and regulatory reporting
• How backups are restored
• How affected credentials are reset
• How lessons are applied after the incident

The OWASP Top 10:2025 specifically identifies security logging and alerting failures as a major application risk. Without sufficient visibility, attackers may remain undetected and incident investigations may lack reliable evidence.

Website Security Checklist

• All platforms, plugins, themes, libraries, and servers are supported and updated.
• Unused software and accounts have been removed.
• MFA is enabled for privileged and business-critical accounts.
• Each user has an individual account.
• Access follows least-privilege principles.
• HTTPS is enabled across every page and subdomain.
• Certificates renew automatically.
• Sensitive data is encrypted and retained only when necessary.
• Automated backups run successfully.
• Backup restoration is tested.
• A WAF and appropriate DDoS protection are active.
• Administrator and API endpoints have rate limiting.
• Secure coding requirements are documented.
• Dependencies are scanned for vulnerabilities.
• Penetration testing is completed based on risk.
• Security logs are centralised and reviewed.
• Alerts are configured for suspicious activity.
• An incident-response plan is documented and tested.
• Third-party access and integrations are reviewed.
• Security ownership is clearly assigned.

The checklist should be adapted to the website’s platform, data, integrations, customer base, transaction volume, and regulatory environment.

Common Website Security Mistakes

Website compromises often result from several small weaknesses rather than one highly sophisticated attack. Avoiding common errors can significantly reduce exposure.

• Assuming HTTPS secures the entire website: HTTPS protects transmitted data but does not stop malware, access-control failures, vulnerable code, or stolen administrator accounts.
• Keeping unused plugins and accounts: Every unnecessary component or credential increases the attack surface.
• Using one administrator account for everyone: Shared accounts weaken accountability and complicate access removal.
• Delaying critical updates: Publicly disclosed vulnerabilities may be scanned and exploited quickly.
• Storing backups on the same server: An attacker or infrastructure failure may destroy both the website and its backups.
• Relying entirely on automated scans: Scanners may not identify business-logic, workflow, and authorisation weaknesses.
• Ignoring third-party services: Payment providers, marketing tools, scripts, APIs, and development partners can introduce additional risk.
• Collecting excessive customer data: Retaining unnecessary information increases the potential impact of a breach.
• Launching without monitoring: A business may not recognise an attack until customers or search engines report the problem.
• Treating security as a one-time project: Threats, software, configurations, users, and integrations change continuously.

A mature security programme assigns responsibility, establishes repeatable processes, measures performance, and updates controls as the website and threat landscape evolve.

How SmartOSC Enhances Website Security

SmartOSC supports organisations that need to protect complex websites, applications, cloud platforms, connected systems, and customer experiences.

Established in 2006, SmartOSC has more than 1,000 technology experts across 11 offices in nine countries. Its cybersecurity practice works across cloud, hybrid environments, applications, mobile platforms, networks, endpoints, and digital infrastructure.

SmartOSC’s capabilities include:

• Application security: Integrating security throughout requirements, design, development, testing, deployment, and operation.
• Penetration testing: Simulating controlled attacks to identify exploitable vulnerabilities and realistic business risk.
• Vulnerability assessment: Detecting weaknesses across applications, infrastructure, configurations, and connected systems.
• Cloud security: Protecting workloads, applications, containers, access controls, and data across cloud environments.
• Mobile security: Strengthening application, data, authentication, and device protection.
• Network security: Protecting data flows and communications through detection and preventative controls.
• Endpoint security: Improving prevention, detection, investigation, and response across connected devices.
• Threat intelligence: Using relevant threat information to help organisations prioritise and reduce business risk.
• Incident response: Establishing responsibilities and specialist support before a serious security event occurs.

This broad approach is valuable for businesses whose websites connect with commerce platforms, payment services, CRM systems, cloud infrastructure, mobile applications, customer portals, or other enterprise technologies. SmartOSC can help organisations address individual vulnerabilities while also improving their longer-term security posture.

Watch more: How Can AI Be Used in Cyber Security for Threat Detection and Prevention?

FAQs: How to Make a Website Secure

1. Is HTTPS enough to make a website secure?

No. HTTPS encrypts information travelling between the browser and website, which is essential for protecting data in transit. However, it does not prevent vulnerable plugins, insecure code, malware, account takeover, weak access controls, or server misconfiguration. HTTPS should be combined with updates, MFA, secure development, firewalls, backups, testing, and monitoring.

2. How often should a website undergo a security audit?

The appropriate frequency depends on the website’s risk level, data, functionality, and rate of change. Businesses should conduct ongoing automated monitoring and complete more detailed assessments after major releases, platform migrations, infrastructure changes, sensitive integrations, or security incidents. High-risk eCommerce, financial, healthcare, and customer-account platforms may require more frequent reviews and penetration testing.

3. Can small businesses secure a website without an internal security team?

Small businesses can significantly improve protection by choosing a reputable managed hosting provider, enabling automatic updates and MFA, using a WAF, maintaining protected backups, limiting administrator access, and working with qualified development or cybersecurity specialists. Security responsibilities should still be documented so that the organisation knows who monitors alerts, applies updates, restores backups, and responds to incidents.

4. How can a business tell whether its website has been hacked?

Possible indicators include unfamiliar administrator accounts, unexpected redirects, modified pages, new files, unusual server activity, traffic spikes, customer login complaints, payment anomalies, browser warnings, search-engine security notifications, or unexplained performance problems. Some compromises produce few obvious signs, making centralised logging, file-integrity monitoring, malware scanning, and security alerts essential.

5. Does website security affect SEO?

Website security can affect organic performance indirectly and, in some circumstances, directly. Hacked pages, malware warnings, spam content, malicious redirects, downtime, and blocked resources can prevent users and search engines from accessing the intended website. Google recommends HTTPS and considers page experience when evaluating content, but security alone will not replace relevant content, usability, authority, and sound technical SEO.

Conclusion

Learning how to make a website secure is not about implementing one tool or completing a single audit. It requires a continuous programme covering updates, authentication, encryption, backups, firewalls, secure development, testing, monitoring, and incident response.

Businesses should prioritise controls according to their risks, protect sensitive customer information, remove unnecessary exposure, and regularly verify that recovery processes work. A website that is secure today may become vulnerable later as software, threats, users, integrations, and infrastructure change.

SmartOSC combines application security, cloud security, penetration testing, vulnerability assessment, threat intelligence, network protection, and incident response to help organisations build and maintain more resilient digital environments. Businesses can work with SmartOSC to assess existing risks, strengthen website security, and establish a practical roadmap for long-term protection. Contact us now!