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Security report for kleinbuilding.cz

Klein Building s.r.o. · Real Estate · Czech Republic

High risk. 10 critical or high findings in GDPR outside view, Email security and 3 other checks.

Security score

43/100

Risk levelHigh

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

Klein Building s.r.o. is a Czech Republic-based small construction and engineering company specializing in building family houses, reconstruction projects, and energy-efficient building solutions including passive and low-energy homes. The company also provides energy consulting services and assists clients with subsidy programs such as Nová zelená úsporám. The website is professionally designed using WordPress and includes modern technologies like Google reCAPTCHA and Contact Form 7 for user interaction. Privacy and cookie policies are present, indicating awareness of GDPR compliance. However, the absence of WHOIS registrant data and explicit contact emails or phone numbers on the website reduces transparency and trustworthiness. Security posture is moderate with HTTPS enforced but lacking advanced security headers. Overall, the website presents a credible small business with room for improvement in security and contact transparency.

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

10 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

  2. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  3. 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 kleinbuilding.cz

This scan found 27 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

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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
62
Security headers
15
Email security
60
DNS health
75
Network security
20
GDPR outside view
25
Average
43

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 energy sectors, targeting customers interested in construction and energy-efficient building solutions in the Czech Republic. Its business model focuses on providing construction services combined with specialized energy consulting and subsidy program support, which can be a competitive advantage in the regional market. The partnership ecosystem includes specialized energy audit sites and a professional web design firm, indicating collaboration with relevant service providers. The website content is relevant and professional, supporting business credibility, though the lack of direct contact details may hinder customer engagement.

Security posture

The website enforces HTTPS and uses Google reCAPTCHA to protect forms, which are positive security measures. However, no security headers such as Content-Security-Policy or X-Frame-Options were detected, which could expose the site to certain web-based attacks. The absence of explicit security policies or incident response information indicates a low maturity level in security governance. No vulnerabilities or exposed sensitive data were found in the analysis. Overall, the security posture is moderate but could be enhanced by implementing additional headers, regular updates, and publishing security policies.

Recommendations

  1. Implement security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to improve protection against common web attacks.
  2. Publish explicit security and incident response policies on the website to improve transparency and preparedness.
  3. Add clear company contact information including verified emails and phone numbers to enhance trust and customer communication.
  4. Regularly update WordPress core and plugins to mitigate potential vulnerabilities.
  5. Consider publishing a vulnerability disclosure policy or security.txt file to encourage responsible reporting of security issues.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Klein Building s.r.o.
Description
Stavební firma Klein building s.r.o. staví rodinné domy, provádí rekonstrukce staveb a nabízí další řady projektů. Specializuje se na nízkoenergetické a pasivní domy, energetické poradenství a zpracování průkazů energetické náročnosti budov.
Key services
Construction of family houses, Building reconstruction, Energy consulting, Preparation of energy performance certificates (PENB), Support for subsidy programs (Nová zelená úsporám)
Content quality
good
Branding
consistent

Technology

Stack
WordPress, jQuery, Google reCAPTCHA, Contact Form 7
Platforms
WordPress
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Use of Google reCAPTCHA on forms

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is accessible and not blocked by WAF or security mechanisms.
  2. WHOIS data is missing, limiting domain trust analysis.
  3. Website uses HTTPS and modern web technologies.
  4. Privacy and cookie policies are present and compliant.
  5. No explicit contact emails or phone numbers found in the HTML content.
  6. Social media links exist but URLs are empty or missing.
  7. No visible security headers detected in provided data.
  8. Content is focused on construction and energy consulting services.
  9. No advertising or tracking scripts detected beyond Google reCAPTCHA and Contact Form 7.
  10. No vulnerability disclosure or incident response information found.
Technical notes

Notes

The website is built on WordPress with common plugins such as Contact Form 7 and uses jQuery and Google reCAPTCHA for enhanced user interaction and spam protection. The site loads CSS and JS assets asynchronously and defers emoji scripts to optimize performance. Mobile optimization is good, and SEO meta tags including Open Graph and Twitter cards are properly configured. However, no advanced frameworks or hosting provider information was detected. Performance is moderate with no evident broken elements. Accessibility is basic but could be improved with additional ARIA attributes and semantic markup. Overall, the technical implementation is solid for a small business website but could benefit from modernization and enhanced accessibility.
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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