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Security report for century21.cz

CENTURY 21 · Real Estate · Czech Republic

Medium risk. 7 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

65/100

Risk levelMedium

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

CENTURY 21 Czech Republic operates as a real estate brokerage and property listing service, offering a wide range of residential and commercial properties. The website presents a professional and modern interface targeting buyers, sellers, and real estate agents within the Czech market. The company emphasizes trust and partnership, with multiple property categories and career/franchise opportunities. Technically, the site leverages modern frameworks such as Next.js and React, and integrates analytics tools like Microsoft Clarity and Hotjar for user behavior insights. Security posture is strong with HTTPS and security headers implemented, though explicit privacy and cookie policies are not clearly found in the provided content. WHOIS data is unavailable, which reduces domain trust but the website content and branding suggest a legitimate business. Overall, the site is well-structured and user-friendly, but could improve transparency on privacy and contact information.

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

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  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 century21.cz

This scan found 22 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

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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
30
Email security
90
DNS health
85
Network security
100
GDPR outside view
25
Average
65

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention century21.cz, from OffSeq Breach.

Total records
46
Employees
12
Customers
7
Third parties
27
Weak passwords
28%

Latest record dated 2026-05-26 · 5 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for century21.cz.

Select it in the checkout above.

Masked preview

  • –century21.cz2026-05-26
  • –pop3mail.century21.cz2026-05-26
  • –smtpmail.century21.cz2025-07-31
  • –mail.century21.cz2025-07-28
  • –smtpmail.century21.cz2025-07-24

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

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 positions itself as a reliable real estate partner in the Czech Republic, with a medium-sized market presence. Its business model focuses on property sales, brokerage services, and franchising. The website targets property buyers, sellers, and prospective real estate agents. The presence of dedicated career and franchising portals indicates a growth strategy through network expansion. The company leverages partnerships with external project sites and promotes specialized real estate projects. Revenue streams likely include commissions from property sales and franchise fees. The website content is professionally curated, supporting a strong brand image and market credibility.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, comprehensive security headers, and no visible exposure of sensitive data. The use of reputable analytics and tracking services is balanced with standard security practices. However, the absence of explicit privacy and cookie policies and lack of a vulnerability disclosure mechanism indicate gaps in compliance and transparency. Incident response contact information is not evident, which could hinder timely reporting of security issues. Overall, the site is secure but would benefit from enhanced privacy compliance and formal security communication channels.

Recommendations

  1. Publish clear and comprehensive privacy and cookie policies with user consent mechanisms to improve GDPR compliance.
  2. Add terms of service and security policy pages to enhance transparency and user trust.
  3. Implement a vulnerability disclosure policy or security.txt file to facilitate responsible reporting of security issues.
  4. Provide explicit contact information for security incidents, including dedicated security or abuse email addresses.
  5. Enhance accessibility features to meet compliance standards and improve user experience for all visitors.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
CENTURY 21
Description
Stovky nemovitostí na prodej každý den. To je realita.
Key services
Real estate sales, Broker services, Property listings, Franchising, Career opportunities for real estate agents
Content quality
good
Branding
consistent

Technology

Stack
React, Next.js, JavaScript, CSS, Google Tag Manager, Microsoft Clarity, Hotjar, Google Translate
Frameworks
Next.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of security headers
  • No exposed sensitive data in HTML
  • Secure forms with proper input fields

Analytics and tracking

Services
Microsoft Clarity, Google Tag Manager, Hotjar
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Microsoft Clarity, Hotjar
Marketing tools
Microsoft Clarity, Hotjar
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. WHOIS data is unavailable, which is unusual and reduces domain trust.
  3. Website uses modern web technologies and analytics tools.
  4. No explicit privacy or cookie policies found in the provided content.
  5. Contact information such as emails or phone numbers is not explicitly found in the provided HTML snippet.
  6. Website content is professionally presented and focused on real estate services in Czech Republic.
  7. Multiple external domains linked are related to analytics, translation, and partner sites.
  8. No suspicious or malicious content detected.
Technical notes

Notes

The website is built on a modern technology stack including Next.js and React, ensuring good performance and responsiveness. It uses WordPress as a CMS backend for content management. Analytics tools such as Microsoft Clarity, Google Tag Manager, and Hotjar are integrated for user behavior tracking. The site is mobile-optimized and SEO-friendly with proper meta tags and Open Graph data. Security headers and HTTPS are properly configured, contributing to a secure browsing experience. Some technical debt may exist in the form of missing privacy and cookie policy implementations. Overall, the technical infrastructure supports a professional and scalable online presence.
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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