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Security report for rezani-vrtani.cz

Diamond Experts · Real Estate · Czech Republic

Medium risk. 9 critical or high findings in GDPR outside view, Security headers and 3 other checks.

Security score

53/100

Risk levelMedium

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

Diamond Experts is a specialized service provider in the Czech Republic focusing on core drilling and concrete cutting services. With over 25 years of experience, the company serves both businesses and households primarily in Prague and the surrounding regions. Their offerings include a wide range of concrete-related services such as wall saw cutting, joint cutting, chemical anchoring, and structural reinforcement. The website reflects a mature business with clear contact information, certifications, and customer testimonials that enhance trust and credibility. Technically, the site employs modern JavaScript libraries and Google services for analytics and advertising, with a cookie consent mechanism that aligns with GDPR requirements. Security measures include the use of hCaptcha for bot protection, but there is room for improvement in security headers and incident response transparency. Overall, the website is professional, well-structured, and trustworthy, supporting the company's market position as a local expert in construction services.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 100 · High
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

9 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 rezani-vrtani.cz

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  • TLS certificates and expiry
  • DNS records
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  • 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
72
Security headers
20
Email security
80
DNS health
85
Network security
20
GDPR outside view
40
Average
53

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

The company operates in the real estate and construction sector, targeting both commercial and residential clients. Their business model is service-oriented, focusing on specialized concrete drilling and cutting techniques. The firm leverages certifications from industry leaders like Tyrolit, Hilti, and Petrunder to demonstrate expertise. The website's content and testimonials suggest a strong local reputation and a commitment to quality and innovation. Marketing efforts include Google Ads and retargeting via Seznam, indicating active customer acquisition strategies. The company maintains a Facebook presence but lacks broader social media engagement. No parent or subsidiary companies are identified, indicating an independent small business. The domain age and WHOIS data support the company's claims of long-term operation, enhancing credibility.

Security posture

The website demonstrates a moderate security posture with HTTPS usage implied but not explicitly confirmed in the provided data. The presence of hCaptcha indicates proactive bot mitigation. However, the absence of visible security headers such as Content Security Policy, HSTS, or X-Frame-Options suggests potential vulnerabilities to common web attacks. No incident response or security policy information is available, which could hinder timely handling of security events. The cookie consent implementation is robust, supporting GDPR compliance, but no data protection officer contact or vulnerability disclosure policy is present. Overall, while basic security practices are in place, enhancements are recommended to strengthen the security framework and compliance posture.

Recommendations

  1. Implement and enforce comprehensive security headers (CSP, HSTS, X-Frame-Options) to mitigate common web vulnerabilities.
  2. Publish a clear security policy and provide incident response contact information to improve transparency and readiness.
  3. Verify and enforce HTTPS across the entire website to ensure secure data transmission.
  4. Conduct regular audits of third-party scripts and dependencies to identify and remediate potential vulnerabilities.
  5. Enhance privacy compliance by publishing a detailed privacy policy and terms of service pages.

Contact details published on the site

Addresses
Legal name
Diamond Experts
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Diamond Experts
Description
Specializes in core drilling and concrete cutting services, serving businesses and households primarily in Prague, central and northern Bohemia.
Key services
Jádrové vrtání (Core drilling), Řezání stěnovou pilou (Wall saw cutting), Řezání spár (Joint cutting), Řezání v panelovém domě (Cutting in panel houses), Řezání lanovou pilou (Wire saw cutting), Chemické kotvení (Chemical anchoring), Těsnění prostupů (Sealing of penetrations), Zesilování konstrukcí (Structural reinforcement)
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Bootstrap, Google Tag Manager, Google Analytics, Google Ads, hCaptcha, CookieYes cookie consent, GMaps API, Owl Carousel, Revolution Slider
Frameworks
Bootstrap
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • Use of hCaptcha for bot protection
  • Cookie consent mechanism implemented

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
Google Ads, DoubleClick
Tracking pixels
Facebook Pixel
Marketing tools
CookieYes
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking detected.
  2. Cookie consent is implemented with detailed categories and user controls.
  3. No explicit privacy policy or terms of service pages found.
  4. Contact information is clearly presented with phone, email, and physical address.
  5. Multiple certifications and customer testimonials enhance trust.
  6. Use of modern JavaScript libraries and Google services for analytics and ads.
  7. No security headers detected in provided data; potential area for improvement.
  8. No visible forms collecting personal data except contact forms (not explicitly detailed).
  9. Social media presence limited to Facebook.
  10. No data protection officer or incident response contacts found.
Technical notes

Notes

The website utilizes a modern technology stack including jQuery, Bootstrap, Google Tag Manager, Google Analytics, and hCaptcha. It integrates third-party services for maps (Google Maps API), video (YouTube embeds), and cookie consent (CookieYes). Performance is moderate with some optimization via PageSpeed indicated by resource naming. The site is mobile responsive with good navigation clarity and professional design. Accessibility features are basic but present. No CMS is explicitly detected, suggesting a custom or static site build. Hosting provider details are not evident. The site uses multiple JavaScript libraries and plugins, which may introduce technical debt if not maintained. Overall, the technical infrastructure supports the business needs but could benefit from modernization and security hardening.
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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