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Security report for semerinka.cz

CRESTYL real estate s.r.o. · Real Estate · Czech Republic

Medium risk. 7 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

50/100

Risk levelMedium

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

The website www.semerinka.cz represents a residential real estate project named Semerínka, developed by CRESTYL real estate s.r.o., a recognized Czech developer. The project offers new family housing near the Radlická metro station in Prague, emphasizing proximity to nature, city center, and comprehensive amenities. The site targets families and investors seeking quality apartments with community and green spaces. The business model focuses on real estate development and sales, positioning itself as a premium offering in the Prague market. Technically, the website employs modern web technologies including JavaScript frameworks like StimulusJS, uses Typekit fonts, and integrates multiple tracking and marketing tools such as Google Tag Manager, Facebook Pixel, Adform, and Smartlook. The site is mobile-optimized, accessible, and SEO-friendly with a professional design and clear navigation. Cookie consent and privacy policies are implemented in compliance with GDPR. From a security perspective, the site uses HTTPS with good SSL configuration but lacks visible security headers in the HTML source. No exposed sensitive data or vulnerabilities were detected. However, the absence of WHOIS data reduces transparency and trustworthiness. No explicit security policies or incident response contacts are provided. Overall, the website is professional, trustworthy, and well-designed for its business purpose. The main risk lies in the lack of publicly available WHOIS data and missing security headers. Strategic improvements in security headers, incident response information, and WHOIS transparency would enhance trust and compliance.

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

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

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook

      What to do: Document all third-party data sharing in your privacy policy

  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 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 semerinka.cz

This scan found 26 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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Full report

€39.90one-time

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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
72
Security headers
30
Email security
55
DNS health
80
Network security
20
GDPR outside view
40
Average
50

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

CRESTYL real estate s.r.o. is a medium-sized Czech real estate developer with a strong market position, known for multiple award-winning projects. Semerínka is positioned as a family-friendly residential development in a growing Prague neighborhood with modern infrastructure. The business model relies on property sales targeting families and investors. The company maintains a client portal and active social media presence, indicating a mature customer engagement strategy. Partnerships with design and marketing firms like Madlove enhance brand presentation. The project benefits from proximity to public transport and nature, appealing to urban families seeking quality living spaces. Growth indicators include ongoing development phases and planned occupancy in early 2026.

Security posture

The website demonstrates a moderate to good security posture with mandatory HTTPS and cookie consent mechanisms in place. However, the absence of security headers such as Content Security Policy, X-Frame-Options, and HSTS is a notable gap. No vulnerabilities or exposed sensitive data were found in the HTML content. The site uses multiple third-party tracking scripts, which are managed with user consent, aligning with GDPR requirements. The lack of explicit security policies, incident response contacts, and vulnerability disclosure mechanisms indicates room for improvement in security governance and transparency. The missing WHOIS data also impacts trust and domain legitimacy assessment.

Recommendations

  1. Implement comprehensive security headers including CSP, HSTS, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  2. Publish explicit security and incident response policies on the website, including contact channels for reporting security issues.
  3. Ensure WHOIS data is publicly available and accurate to improve domain transparency and trustworthiness.
  4. Regularly audit and update third-party scripts to mitigate risks from external dependencies.
  5. Enhance privacy compliance by providing detailed data retention policies and user rights information.

Contact details published on the site

Addresses
Legal name
CRESTYL real estate s.r.o.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
CRESTYL real estate s.r.o.
Description
Semerínka is a residential real estate project offering new family housing near Radlická metro station in Prague, close to city center and nature, with services and civic amenities nearby.
Key services
Residential apartment sales, Family-oriented housing development, Community and green space planning
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Typekit Fonts, Google Tag Manager, Facebook Pixel, Adform Tracking, Smartlook Analytics
Frameworks
StimulusJS (data-controller attributes), Embla Carousel
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics (via GTM), Smartlook
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Adform
Tracking pixels
Facebook Pixel, Smartlook
Marketing tools
Facebook Pixel, Adform Tracking
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 transparency
  3. Strong cookie consent and privacy policy presence indicating GDPR compliance
  4. Multiple tracking and advertising scripts present with user consent
  5. Clear contact information and company details provided
  6. No security headers detected in HTML source; recommend adding
  7. No explicit security or incident response policies found
  8. No terms of service page detected
  9. No vulnerability disclosure or security.txt found
  10. Website targets family residential real estate market in Prague
Technical notes

Notes

The website uses a modern tech stack with JavaScript frameworks (StimulusJS), embla carousel for UI, and Typekit fonts for typography. It integrates multiple analytics and marketing tools such as Google Tag Manager, Facebook Pixel, Adform, and Smartlook, indicating a mature digital marketing infrastructure. The site is mobile-optimized with responsive images and accessibility features like skip links and ARIA attributes. Performance is moderate, with some external script dependencies that could impact load times. No CMS was detected, suggesting a custom or static site architecture. Hosting provider details are not disclosed. The site uses HTTPS with a valid SSL certificate. Overall, the technical implementation supports a professional user experience but could benefit from enhanced security headers and performance optimizations.
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

Earlier scans of this domain

  1. 50/100Medium35 findingsView report
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