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Security report for master.cz

Master Internet, s.r.o. · Technology · Czech Republic

Medium risk. 7 critical or high findings in GDPR outside view and Security headers.

Security score

71/100

Risk levelMedium

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

Master Internet, s.r.o., operating under the brand MasterDC, is a well-established Czech IT infrastructure specialist with over 20 years of experience. The company operates two data centers located in Brno and Prague and offers a broad portfolio of IT services including dedicated servers, cloud hosting, managed services, IT consulting, and cybersecurity solutions. Their target audience primarily consists of businesses seeking reliable and expert IT infrastructure support. The website reflects a mature digital presence with comprehensive service descriptions and professional branding. Technically, the website is built on a modern WordPress platform using Elementor and Yoast SEO, supported by performance optimization tools like WP Rocket. The site is mobile-optimized, accessible, and SEO-friendly, leveraging Google Analytics and Google Tag Manager for analytics and marketing. The infrastructure and technology stack indicate a high level of digital maturity suitable for their business domain. From a security perspective, the site enforces HTTPS and implements cookie consent mechanisms aligned with GDPR requirements. No critical vulnerabilities or exposed sensitive data were detected. However, the absence of certain HTTP security headers and a security.txt file suggests room for improvement in security best practices. The WHOIS data is unavailable, likely due to privacy protection, but the website's professional presentation and consistent contact information support its legitimacy. Overall, MasterDC presents a trustworthy and professional online presence with strong compliance and security posture. Strategic recommendations include enhancing HTTP security headers, publishing a vulnerability disclosure policy, and increasing visibility of incident response contacts to further strengthen their security and trustworthiness.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
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

7 findings rated critical or high. Fix these first.

  1. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

  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 X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • 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';…

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

Keep watching master.cz

This scan found 17 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.

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Recommended

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

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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
100
Security headers
15
Email security
95
DNS health
90
Network security
100
GDPR outside view
25
Average
71

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
  • 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

MasterDC holds a strong market position in the Czech Republic as a specialist in corporate IT infrastructure and data center services. Their competitive advantage lies in operating their own data centers and offering a wide range of tailored IT solutions including cloud transformation, cybersecurity aligned with NIS2, and managed IT services. The business model focuses on B2B services with revenue streams from hosting, consulting, managed services, and outsourcing. The company targets medium to large enterprises requiring robust IT infrastructure. The website's detailed service portfolio and references indicate a mature partnership ecosystem and a focus on customer success. Growth indicators include active content updates, events, and career opportunities, suggesting ongoing expansion and investment in expertise.

Security posture

The website demonstrates a solid security posture with mandatory HTTPS and GDPR-compliant cookie consent. The use of reputable WordPress plugins and performance optimizers suggests regular maintenance. No exposed credentials or sensitive data were found. However, the lack of explicit security headers such as Content-Security-Policy and Strict-Transport-Security is a gap. There is no visible incident response or vulnerability disclosure information, which could hinder rapid response to security issues. Compliance with GDPR is evident, but additional certifications or security frameworks are not mentioned. Overall, the security maturity is good but could be enhanced by formalizing incident response and improving HTTP security headers.

Recommendations

  1. Implement comprehensive HTTP security headers including Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, and Strict-Transport-Security.
  2. Publish a security.txt file to facilitate vulnerability disclosure and improve transparency.
  3. Enhance visibility and availability of incident response contact channels such as security@ or abuse@ email addresses.
  4. Regularly audit and update all WordPress components to mitigate risks from vulnerable libraries or plugins.
  5. Develop a long-term security strategy including penetration testing, employee security training, and compliance certifications.

Contact details published on the site

Legal name
Master Internet, s.r.o.
VAT number
CZ26277557
Registration number
26277557
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Master Internet, s.r.o.
Description
O firemní IT se staráme už přes 20 let. Provozujeme dvě datová centra – v Brně a Praze – a náš tým IT specialistů poskytuje širokou škálu služeb.
Key services
Dedicated servers, Cloud server hosting, VPS hosting, Managed servers, Server housing, Cluster solutions, IT consulting and training, IT infrastructure design, Managed services, IT outsourcing
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress 6.8.2, Elementor 3.28.4, Yoast SEO Premium, jQuery 3.7.1, Google Tag Manager, Google Analytics, Jet Mega Menu, Ajax Search Lite, WP Rocket, Complianz GDPR Premium
Frameworks
WordPress, Elementor
Platforms
Web
Performance
fast
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML
  • Use of security plugins (implied by WordPress ecosystem)

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Ads
Marketing tools
Yoast SEO
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 no blocking or WAF challenge
  2. WHOIS data is unavailable or privacy protected
  3. Strong GDPR and cookie compliance with explicit consent mechanism
  4. Comprehensive product and service portfolio clearly presented
  5. Use of modern WordPress ecosystem and SEO tools
  6. No visible security vulnerabilities or exposed sensitive data
  7. Contact information is clearly provided and consistent with business identity
  8. Social media presence on Facebook and X (Twitter) is linked
  9. No evidence of adult or questionable content
  10. Good advertising and analytics transparency
Technical notes

Notes

The website is built on WordPress 6.8.2 with Elementor 3.28.4, leveraging modern front-end technologies including jQuery 3.7.1 and Google Tag Manager for analytics and marketing. The presence of WP Rocket indicates performance optimization efforts. The site is mobile responsive and accessible with good SEO practices implemented via Yoast SEO Premium. The technology stack is mature and well-maintained, supporting a professional business website. No technical debt or deprecated technologies were detected. Hosting provider details are not explicit, but the use of custom data centers by the company suggests a robust backend infrastructure. Opportunities exist to improve security headers and formalize security policies to reduce technical risks.
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

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