How to Protect Your Website from Hackers and Cyberattacks

Website security refers to the practices and measures that protect a site from unauthorised access, data theft and disruption. Most successful website attacks do not involve sophisticated techniques. They exploit predictable weaknesses: outdated software, reused passwords and unprotected login pages. UK businesses are not immune to these security threats, and the consequences go beyond a temporary outage. Data breaches involving sensitive customer data, credit card details or phone numbers may need to be reported to the ICO within 72 hours under UK GDPR. Hacked websites also damage search engine rankings and visitor trust. Website security UK businesses need to prioritise is less about complex tools and more about eliminating the predictable weaknesses malicious actors rely on.

This website security checklist covers the core security measures that protect websites against the most common cyber threats and hacking attempts. None require specialist knowledge, but they do require consistency.

Keep all software current

Outdated software is one of the most common entry points for attackers. When a vulnerability is discovered in a CMS, plugin or theme, the developer releases a patch. The window between that disclosure and the patch being applied is when sites running the old version are most exposed, because the vulnerability is now publicly documented.

For a WordPress website, enable automatic updates for core, plugins and your active theme. For other platforms, check your update settings and apply security releases promptly. The same logic applies to your own devices: keeping your operating system and browser current reduces the risk of credentials being compromised at your end rather than the server. For sites with custom-built components, secure coding practices reduce the attack surface before vulnerabilities are ever introduced.

Use strong credentials and two factor authentication

Credential stuffing attacks use lists of username and password combinations leaked from other breaches and test them automatically against new targets. If you reuse passwords across accounts, a breach elsewhere can expose your hosting panel, CMS admin area and email simultaneously.

Strong passwords are long, random and not based on personal information or dictionary words. A password manager makes maintaining unique strong passwords for every account practical rather than burdensome. Where two factor authentication 2FA is available, enable it. Multi factor authentication adds a second verification step at login so that a compromised password alone is not enough to gain access to administrative access areas. Preventing unauthorized access to your content management system (CMS) and hosting panel is one of the highest-value security steps a website owner can take. 2FA is worth treating as a requirement for all admin accounts rather than an optional extra.

Install an SSL certificate

An SSL certificate enables hypertext transfer protocol secure (HTTPS), encrypting data transmitted between your web server and its visitors. Without one, information submitted through forms, including login credentials, credit card details and sensitive information, travels in plain text over HTTP traffic and can be intercepted. Attackers use this to steal data from legitimate users on legitimate websites. Browsers now flag sites without SSL as “Not Secure”, which affects visitor trust and is a confirmed factor in search engines’ ranking signals. HTTPS is what enables secure websites: it encrypts the connection end to end. Secure connections via HTTPS address one of the most common website security issues and are a baseline requirement for modern data security.

Enabling Strict Transport Security (HSTS) ensures browsers always use HTTPS, preventing downgrade attacks that could expose encrypted data. Free Let’s Encrypt certificates cover most use cases. For sites handling payment card data or storing sensitive customer data, a paid certificate with extended validation may be more appropriate. UWH offers a range of SSL certificates to suit different requirements.

Add a web application firewall

A web application firewall filters malicious traffic between the internet and your site, blocking requests that match known attack patterns before they reach your application. This covers SQL injection attacks where malicious actors submit sql code through user input fields, cross site scripting attacks where malicious code or malicious script is injected into pages, DDoS attacks and requests from known malicious IP addresses. Web application security at the firewall level acts as a constant monitoring layer against injection attacks and other malicious attacks that target known vulnerabilities.

For custom-built components or any application that handles user input, parameterised queries and prepared statements are the correct defence against SQL injection. These treat user input as data rather than executable code, preventing injection attacks regardless of what a user submits. Input validation and sanitisation (cleaning and filtering submitted data before it is processed) reduces the attack surface further. A WAF catches known patterns at the network level; parameterised queries close the underlying vulnerability at the code level. Both are necessary on any site that handles form submissions.

Cloudflare offers WAF functionality at the DNS level, meaning malicious traffic is filtered before it reaches your web server at all. Many WordPress security plugins, including Wordfence, include a WAF as part of their feature set. A WAF does not replace the other measures here, but it catches a large proportion of automated hacking attempts without any manual intervention. Your hosting provider may also offer DDoS protection at the network level as standard.

Back up regularly and test restores

Backups do not prevent attacks, but they determine how quickly you recover from one. Ransomware, defacement and accidental data loss all become far less damaging when you have recent, clean backup files of your website files and database available. A backup stored only on the same server as your site offers limited protection if that server is compromised.

The 3-2-1 backup formula is a widely used framework for data resilience: keep three copies of your data, store them on two different media types, and keep one copy offsite or in a separate cloud account. Applied practically: your live site is one copy, a local backup is the second, and an offsite backup to a different cloud account or external storage is the third. Aim for daily backups stored in a separate location away from your hosting server. Regularly testing backup recovery procedures is critical: a backup you have never restored is one you cannot rely on when you need it. Ask your hosting provider whether automated backups are included and what the retention period covers.

Limit login attempts and tighten access

Brute force attacks work by cycling through large numbers of password combinations until one works. Limiting failed login attempts before an IP address is temporarily blocked cuts this off. Most WordPress security plugins handle this as a standard feature. Removing user accounts that are no longer active and reviewing permissions regularly means access reflects what people genuinely need rather than accumulating over time.

If your hosting panel or CMS admin area does not need to be accessible from every IP address, allowlisting specific addresses adds a layer of protection that is hard to bypass even with valid credentials.

The UK framework: NCSC and Cyber Essentials

UK businesses have access to government-backed guidance that is often more directly applicable than US-focused security advice. The National Cyber Security Centre (NCSC) publishes free, practical guidance for businesses of all sizes. Its Small Business Guide covers the same areas addressed here, and its threat intelligence feeds inform the security community’s understanding of active UK-targeted attacks.

Beyond Cyber Essentials, UK businesses handling sensitive data at scale may also look to ISO/IEC 27001, an internationally recognised standard for Information Security Management Systems. Websites that process or transmit payment card information are subject to PCI DSS compliance, which sets requirements for secure network architecture and end-to-end encryption. The Privacy and Electronic Communications Regulations (PECR) require websites to obtain clear consent from users before deploying tracking technologies such as cookies or analytics scripts. These frameworks sit alongside UK GDPR rather than replacing it.

The Cyber Essentials scheme is a government-backed certification that verifies an organisation’s defences against the most common cyberattacks. The five technical controls it requires are: firewalls, secure configuration, user access control, malware protection and patch management. These map directly onto keeping software updated, using a WAF, controlling admin access, using security tools and applying patches promptly. For UK businesses bidding on government contracts, Cyber Essentials certification is now a requirement for many procurement frameworks. For others, it provides a recognised baseline that communicates security maturity to clients and partners.

Certification for the basic Cyber Essentials assessment costs around £300 to £500 for most small businesses and is renewed annually. It is one of the more cost-effective ways to demonstrate security credibility in the UK market. Aware-Soft supports UK businesses through the Cyber Essentials assessment and certification process.

Web security is an ongoing process. A layered security strategy, keeping software up to date, using strong passwords with two factor authentication, maintaining backup files and running a web application firewall together address the majority of common attack vectors. Regular security audits and security testing help identify security issues, new threats and security risks before they become security incidents. Staying aware of developments such as post quantum cryptography, which will affect how SSL and encryption standards need to evolve, helps UK businesses plan beyond the current threat landscape. For UK businesses, aligning those practices with NCSC guidance and working toward Cyber Essentials certification adds a recognised framework to what would otherwise be informal good practice. Protecting sensitive customer data is not optional: it is a legal requirement, a core part of your site’s security posture and a foundation for long-term business growth.

For a hosting environment with a security-focused setup, take a look at UWH web hosting plans.