A website for a business is an important channel for sales, communication with customers, collecting requests, and gathering data. Regular website security checks give the owner control over risks: they reduce the likelihood of downtime, traffic loss, data leaks, and expenses for emergency recovery.
The Importance of Website Security Checks
Ignoring website security affects several areas at once: sales, reputation, SEO, and legal risks. Google identifies content from hacked websites as one of the key obstacles to fair search results and user convenience. A breach can affect a business’s online visibility, and the sanctions that follow may lower rankings or remove pages from search results.
Another risk is warnings for users. If the Google Safe Browsing mechanism detects a threat, a warning message appears in the browser before the page is displayed. It is impossible to miss, as the user must manually give consent and accept the associated risks. This directly reduces visits, requests, and trust in the brand.
Therefore, the consequences of security breaches for a business include:
- a drop in organic traffic and inquiries;
- the risk of theft of customer data and accounts;
- the website being added to blacklists;
- additional costs for cleanup, recovery, and information security audits;
- postponed marketing campaigns due to technical limitations.
Regular website reliability checks ensure better control and help avoid problems. The owner can see the current status, priorities, and an action plan instead of having to respond to incidents in emergency mode.
Common Types of Threats to Websites
Website Infection with Viruses
Viruses include code injections, backdoors, replaced files, phishing pages, SEO spam, or malware that is delivered to users through an infected website.
Signs that a website is infected:
- the appearance of unknown pages, redirects, or suspicious messages;
- the browser or Google displays a warning;
- unfamiliar scripts or iframes are visible in the source code;
- the website becomes slower without a clear reason;
- the hosting provider sends notifications about malicious code;
- files change without any scheduled work being performed.
Online scanners help quickly perform a basic website check for viruses, but a complete picture comes from analyzing the files and server configuration. This is important for a business owner: external scanning is useful for a quick assessment, but decisions should only be made after a thorough manual check.
Website Hacking
Website hacking usually occurs due to weak passwords, vulnerable plugins, outdated software, injections, XSS, compromised admin panels, attacks through a vulnerable server, or third-party integrations.
For a business owner, it is important to understand the main points:
- A hack often starts with a small technical vulnerability.
- The consequences affect sales, data, and SEO simultaneously.
- Regular website checks reduce the risk of major losses.

Checking a Website for Reliability and Security: Technical Checklist
1. Checking the Website for Malicious Scripts and Viruses (Basic Level)
At this stage, the task is simple: quickly understand whether there are obvious signs of problems or suspicious behavior.
Check:
- the homepage and several internal URLs through an online service;
- the mobile and desktop versions;
- HTTP and HTTPS versions;
- pages with forms, a cart, and authorization.
2. Checking Whether the Website Is on a Blacklist
Use a basic tool to check the reputation of a URL — Google Safe Browsing. This service publishes regularly updated lists of unsafe resources involved in phishing or the distribution of malicious software.
What to do:
- check the website address via Google Safe Browsing and Transparency Report;
- check the domain and key pages separately;
- record the result in the internal checklist.
3. Identifying Security Issues
Identifying security issues complements virus checks and blacklist checks. The task is to find gaps in settings and access logic that could allow attackers to exploit the website.
Typical signals:
- open access to the admin panel;
- weak password policies;
- file uploads without authorization;
- excessive user permissions;
- public access to backups;
- suspicious API endpoints.
Such mistakes occur even in experienced teams, so this step should be included in every website reliability check.
4. Identifying Outdated Software and Plugins
Outdated CMS versions, themes, and plugins are a common cause of incidents. Hosting providers emphasize that regular updates, removing unnecessary plugins, and using trusted solutions are basic security measures.
What to check:
- CMS version;
- versions of plugins and themes;
- list of deactivated plugins;
- changelog and the date of the latest updates;
- compatibility with the current version of PHP/server software.
5. SSL Check
SSL/TLS verifies the protection of traffic between the user and the website. It is also important to check for mixed content: when part of a page loads via HTTP, it weakens secure websites, and browsers block some unsafe requests or forcibly upgrade certain resources to HTTPS.
An SSL check includes:
- certificate validity;
- the correct domain in the certificate;
- the presence of an HTTP-to-HTTPS redirect;
- absence of mixed content;
- proper operation of forms and payment pages via HTTPS.
6. Using the WhoIs Tool
WHOIS or ICANN Lookup allows you to check basic domain data: status, registrar, registration dates, and renewal dates. It is a tool for viewing current registration data for domain names and internet resources.
It gives businesses control over operational risks:
- whether your domain is registered to your company;
- when the registration expires;
- who has access to domain management;
- whether the contact details for access recovery are up to date.
How to Check a Website for Viruses
Online Services for Checking a Website for Viruses
Online services provide a quick start when you need to check a website by its address without server access.
Recommended minimum:
- Sucuri SiteCheck — external website scanning. The service checks your resource for known viruses, technical errors, outdated software, blacklist status, and malicious code.
- VirusTotal — URL and domain check. The service compares them with 70+ blacklists on the internet and uses website security tools—both proprietary and open-source.
- Google Safe Browsing — URL reputation check in Google databases. A simple but highly authoritative service.
Basic algorithm:
- Insert the website address into Sucuri SiteCheck.
- Check the same URL in VirusTotal.
- Check the domain in Google Safe Browsing.
- Save the results in a single file or table.
- Send the results to technical support or the developer.
Checking a Website for Infection Using Google Search Console
Google Search Console provides a threat signal from the search engine. If the website owner or administrator sees it here, your visitors will receive notifications from Google Safe Browsing in their browsers. That is why it is better to verify it even when using other monitoring tools — this reduces the risk that the issue becomes public.
What to look for in the “Security Issues” section:
- malware / unwanted software;
- phishing / social engineering;
- signs of hacking;
- list of affected pages;
- status after the fix.
Deep Check: Analyzing Server Files for Viruses and Malicious Code
A deep check is required when an online scan has already shown suspicious signals or the website has clear signs of infection. This is where the real cause is usually found.
How to check a website on the server:
- .htaccess — third-party redirects, suspicious rules, injections;
- file modification dates — sudden changes at night or outside the work window;
- PHP and JS files — hidden code, base64, suspicious eval calls;
- uploads — executable files in upload folders;
- cron jobs — automatic запуск of malicious scripts;
- databases — injections in content, SEO spam, suspicious links;
- users and admins — new accounts, role changes, replaced email addresses.
Create a short inspection protocol:
- what was checked;
- what was found;
- which files and tables were modified;
- which actions were performed;
- what should be rechecked after the cleanup.
Tips and Recommendations for Ensuring Website Security: How to Protect Your Site
Organizational and Technical Steps
- Use strong passwords and enable two-factor authentication (2FA) for the admin panel, hosting, and domain;
- Separate access by roles;
- Keep CMS, plugins, themes, and server software updated;
- Remove unnecessary plugins, themes, and test modules;
- Set up regular backups with restoration checks;
- Enable availability monitoring and notifications;
- Check login logs and monitor for suspicious activity;
- Use a WAF/CDN for basic website protection;
- Limit login attempts and protect forms with CAPTCHA;
- Check the website and links after changes, releases, and integrations.
How Often to Conduct Checks
- Daily (automated) — availability monitoring, SSL, critical alerts;
- Weekly — basic URL analysis, update checks;
- Monthly — full scan for viruses, plugins, access permissions, and backups;
- After releases — unscheduled website security check;
- After an incident — full information security audit and reinforcement plan.

Methods for Fixing Errors and Stages of Restoring Website Security
When a problem has been detected, follow a clear sequence of actions. This reduces downtime and minimizes risks. The algorithm is structured as follows:
1. Document the Incident
- Make a backup of the current state.
- Record symptoms, URLs, messages, and the time of detection.
2. Limit Risks
- Change access passwords.
- Close unnecessary accounts.
- Temporarily restrict admin panel access by IP or VPN.
3. Identify the Source
- Check files, .htaccess, and databases.
- Inspect plugins, themes, and server logs.
- Determine the entry point (plugin, password, vulnerable script).
4. Clean and Update
- Remove malicious code and suspicious files.
- Update CMS, plugins, and themes.
- Reinstall the CMS core from the official source if needed.
5. Strengthen Protection
- Configure 2FA, WAF, backups, and monitoring.
- Check file and directory access permissions.
- Close technical “holes” that allowed the hack.
6. Confirm Recovery
- Repeat checks using Sucuri, VirusTotal, and Google Safe Browsing.
- Verify through Google Search Console.
- Test key business scenarios: forms, cart, payment, and requests.
Professional Website Technical Support from Sitesavers
For businesses with active advertising campaigns, SEO, and constant updates, having regular support is more beneficial than one-time emergency work. Professional technical support makes website checks part of the routine process, reducing response time and lowering the risk of significant losses.
Contact the SiteSavers team to receive comprehensive technical support for your website. During the consultation, we will assess the current state and needs of your site, defining an action plan, check schedule, report format, response time standards, and responsibilities for each task. This allows us to prepare a commercial proposal and determine the cost of services.
Frequently Asked Questions
Is installing a security plugin (e.g., Wordfence for WordPress) enough to protect a website?
A security plugin provides a useful basic level of protection, but full website security requires multiple layers: updates, strong passwords, two-factor authentication, backups, SSL checks, domain control, monitoring, and regular virus scans. Even the best tool only covers part of the threats.
How often should a full website security check be performed?
For most businesses, a monthly full check is sufficient, along with unscheduled checks after releases, integrations, or suspicious notifications. For online stores, financial services, and websites with large user databases, it is recommended to increase the frequency to 2–4 times per month.
Do I need to consider protection against DDoS attacks?
Yes, especially if the website generates inquiries, sales, or functions as a client portal. A DDoS attack attempts to overload the service with traffic to disrupt normal operation. Basic website protection includes: CDN/WAF, monitoring, request rate limiting, IP protection, and a coordinated action plan with the hosting provider.
Taras Vasylyshyn
Co-founder of Panem Agency and a digital marketing specialist with over 13 years of experience in online marketing. He has successfully delivered dozens of projects across IT outsourcing, startups, and product companies. His competencies include team and process management, building effective business structures, in-depth market and niche analysis, as well as business design.