Skip to main content

Security report for website21.cz

WebSite21 · Technology · Czech Republic

High risk. 6 critical or high findings in Network security, Security headers and 1 other check.

Security score

49/100

Risk levelHigh

0–100, higher is better. How it is calculated

WebSite21 is a small Czech technology company specializing in custom web development, e-commerce solutions, and mobile application development. With over 15 years of experience, they focus on delivering tailored solutions using PHP frameworks such as Joomla, Nette, and Laravel, as well as C# for mobile apps. Their market position is that of a trusted, experienced provider serving B2B and B2C clients primarily in the Czech Republic. The website demonstrates a high level of professionalism, with comprehensive service offerings, client testimonials, and clear contact information. Technically, the website employs modern web technologies including PHP 8, C#, HTML5, CSS3, UIkit, and jQuery. It is mobile-optimized, fast-loading, and SEO-friendly. The presence of structured data and Google verification tags indicates good digital maturity. Security-wise, the site uses HTTPS with strong SSL configuration and security headers, integrates Google reCAPTCHA on forms, and provides cookie consent mechanisms, reflecting a solid security posture. However, the absence of WHOIS data limits the ability to fully verify domain legitimacy and registration details, which slightly impacts trust. Additionally, no explicit security policy or incident response information is published, which could be improved. Overall, the site is safe, professional, and well-maintained, with minor gaps in transparency and domain registration data. Strategic recommendations include publishing a formal security policy, adding incident response contacts, and considering a vulnerability disclosure program to enhance trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 100 · Low
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

6 findings rated critical or high. Fix these first.

  1. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • Critical

      Critical Service Exposed: MySQL

      Port 3306 (MySQL) is publicly accessible - MySQL - Database server

      What to do: Immediately restrict access to MySQL using firewall or VPN

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

  2. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  3. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1
    • High

      SSL Certificate Expires Soon

      SSL certificate expires in 26 days

      What to do: Renew SSL certificate before expiration

      • NIS2 21(2)(h)
      • IR 2024/2690 9.2(c): Implementing Regulation (EU) 2024/2690, Annex point 9.2(c): Cryptography
      • NIST SC-17: NIST SP 800-53 Rev. 5 SC-17: Public Key Infrastructure Certificates

Need hands-on remediation? Email guard@offseq.com

Keep watching website21.cz

This scan found 23 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

Billed monthly to your card. Cancel anytime. See sample alerts.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
62
Security headers
35
Email security
70
DNS health
80
Network security
0
GDPR outside view
83
Average
55
After the cap
49

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet · found on this site
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

WebSite21 operates in the competitive Czech web development market, leveraging over 15 years of expertise to offer custom web and mobile solutions. Their business model is service-oriented, focusing on bespoke projects for clients needing tailored web applications, e-shops, and marketing services like SEO and PPC. The company targets SMEs and individual entrepreneurs seeking quality digital presence. Their competitive advantage lies in deep technical knowledge of PHP frameworks and a client-centric approach. Revenue streams likely come from project development, maintenance contracts, and digital marketing services. The company maintains active social media profiles and client testimonials, supporting a positive reputation. Growth indicators include a modern website with portfolio showcases and blog content. No direct partnerships or subsidiaries are identified, indicating an independent operation.

Security posture

The website demonstrates a mature security posture with HTTPS enforced, modern security headers, and integration of Google reCAPTCHA to protect forms from abuse. Cookie consent mechanisms comply with GDPR requirements, showing attention to privacy. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the lack of a publicly available security policy or incident response information suggests room for improvement in transparency and preparedness. No vulnerability disclosure or security.txt file is present, which could enhance security culture and trust. Overall, the site is secure for visitors and clients, but formalizing security governance documents would strengthen the posture further.

Recommendations

  1. Publish a comprehensive security policy page detailing security practices and commitments.
  2. Add an incident response contact or page to facilitate reporting and handling of security issues.
  3. Implement a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  4. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.
  5. Enhance accessibility features to improve compliance and user experience for all visitors.

Contact details published on the site

Addresses
Legal name
Martin Kušnir
VAT number
CZ8711081357
Registration number
71786783
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
WebSite21
Description
Nabízíme profesionální tvorbu webových stránek a e-shopů B2C i B2B na míru v Joomla, Nette a Laravel, včetně vývoje softwaru, upgradu Joomla a odvirování Joomla. Vytvoříme moderní a efektivní řešení pro vaše podnikání s důrazem na bezpečnost a škálovatelnost
Key services
custom web application development, custom e-shop development, mobile application development, project maintenance and upgrades, graphic design and web coding, SEO and PPC campaigns
Content quality
excellent
Branding
consistent

Technology

Stack
PHP 8, C#, HTML5, CSS3, LESS, SASS, jQuery, UIkit, Bootstrap
Frameworks
Joomla, Nette, Laravel, .NET MAUI
Platforms
Web, Android
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with granular control
  • Google reCAPTCHA integration on contact form
  • No exposed sensitive data in HTML
  • Use of modern libraries and frameworks

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
minimal
Privacy practices
good

Advertising

Marketing tools
ElfSight widgets
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with rich content and professional design.
  2. No WHOIS data available, which is unusual and reduces domain trust.
  3. Strong presence of privacy and cookie policies with consent mechanisms.
  4. Contact information is comprehensive and consistent across the site.
  5. Use of modern web technologies and frameworks.
  6. No signs of malicious or adult content.
  7. Good SEO and accessibility practices observed.
  8. No explicit security policy or incident response information published.
Technical notes

Notes

The website is built on a solid technical foundation using PHP 8, C#, and popular frameworks Joomla, Nette, and Laravel. Frontend technologies include HTML5, CSS3, UIkit, Bootstrap, and jQuery, ensuring responsive and modern design. The site loads quickly and is optimized for mobile devices, with good SEO practices such as meta tags, structured data, and Google site verification. The use of Google Tag Manager and Analytics indicates a data-driven approach to performance monitoring. No technical debt or outdated technologies were observed. Hosting provider details are not disclosed. Overall, the technical infrastructure supports a professional and scalable web presence with opportunities to improve documentation and security governance.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

Reviews of this site

Share your experience with website21.cz. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review website21.cz.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.