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Security report for bydlisnami.cz

B3 Technology, s.r.o. · Real Estate · Czech Republic

High risk. 11 critical or high findings in GDPR outside view, Security headers and 3 other checks.

Security score

44/100

Risk levelHigh

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

Bydlisnami.cz is a Czech Republic-based online real estate marketplace operated by B3 Technology, s.r.o. The platform offers a wide range of property listings including apartments, houses, land, commercial properties, and others for sale and rent across the Czech Republic. The website also features a blog with articles related to home and real estate topics, targeting individuals and businesses interested in real estate transactions. The business model centers on providing a comprehensive digital marketplace for real estate, supported by advertising revenue and possibly subscription or listing fees. The market position appears established within the regional real estate sector with a professional and consistent brand presence. Technically, the website employs a modern technology stack including jQuery, Bootstrap, Yii Framework, and integrates Google Analytics and Google Tag Manager for analytics and marketing. It uses a consent management platform from InMobi for cookie compliance. The site is mobile optimized with good SEO practices and moderate performance. However, some security headers are missing, and there is no explicit security or incident response policy visible on the site. From a security perspective, the site enforces HTTPS and uses cookie consent mechanisms, which are positive indicators. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. The WHOIS data is privacy protected, which is common for commercial sites, and no suspicious patterns were found. The site lacks visible contact information such as emails or phone numbers on the main pages, which could be improved for trust and compliance. Overall, the website presents a professional and trustworthy real estate platform with a solid technical foundation and basic privacy compliance. Strategic improvements in security headers, explicit security policies, and clearer contact information would enhance its security posture and user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
10/ 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

11 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 bydlisnami.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
72
Security headers
20
Email security
75
DNS health
65
Network security
20
GDPR outside view
10
Average
44

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

Bydlisnami.cz operates in the Czech real estate market as a digital property listing platform. Its competitive advantage lies in offering a broad spectrum of property types and a user-friendly interface with integrated blog content to engage users. Revenue streams likely include advertising and listing fees. The target customers are property buyers, renters, and real estate agents within the Czech Republic. The partnership ecosystem includes related domains under B3 Technology, s.r.o., which provide administrative and policy hosting services. Growth indicators include active content updates and integration of modern marketing tools. The company maintains a medium-sized business profile with consistent branding and a focus on regional market penetration.

Security posture

The website demonstrates a moderate security maturity level with HTTPS enforced and cookie consent implemented via a CMP. However, the absence of key security headers such as Content-Security-Policy and X-Frame-Options reduces its defense-in-depth. No direct incident response or security policy information is available, indicating potential gaps in formal security governance. The use of third-party scripts for advertising and analytics introduces some risk, though no vulnerable libraries were detected in the source. The lack of visible contact information for security or abuse reporting channels is a compliance gap. Overall, the security posture is adequate but could benefit from enhanced header configurations, documented policies, and improved transparency.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web attacks.
  2. Publish explicit security and incident response policies accessible to users and partners to improve transparency and compliance.
  3. Add clear contact information for security incidents and abuse reporting to facilitate timely communication and response.
  4. Regularly audit and update third-party scripts and libraries to minimize vulnerabilities and ensure compliance with privacy regulations.
  5. Enhance user trust by providing visible company contact details and improving accessibility features across the website.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
B3 Technology, s.r.o.
Description
Reality a nemovitosti z celé ČR. Široká nabídka bytů, domů, pozemků, kanceláří a dalších realit k prodeji i pronájmu - vše najdete na Bydlisnami.cz.
Key services
Real estate listings for sale and rent, Property categories: apartments, houses, land, commercial, others, Blog with real estate and home-related articles
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Bootstrap, Google Tag Manager, Google Analytics, Google Adsense, LazyLoad, Yii Framework
Frameworks
Yii
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Use of consent management platform for cookies

Analytics and tracking

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

Advertising

Ad networks
Google Adsense, InMobi
Marketing tools
Consent Management Platform (InMobi CMP)
Transparency
basic

Site quality

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

Key observations

  1. Website is a professional real estate marketplace targeting Czech Republic
  2. Content is well structured with multiple property categories and blog articles
  3. No direct contact emails or phone numbers found on main pages
  4. Use of multiple third-party advertising and analytics services
  5. No visible security headers detected in HTML source
  6. WHOIS data is not publicly available, indicating privacy protection
  7. No signs of WAF or content blocking
  8. Cookie consent mechanism is implemented via InMobi CMP
  9. Terms and privacy policies are hosted on related domain b3technology.cz
Technical notes

Notes

The website is built on a solid technical foundation using the Yii PHP framework, Bootstrap for responsive design, and jQuery for client-side interactions. It integrates Google Analytics and Tag Manager for data collection and marketing, alongside Google Adsense and InMobi CMP for advertising and cookie consent management. The site loads with moderate performance and is mobile optimized. However, there is room for improvement in accessibility and security header implementation. The absence of a detected CMS suggests a custom or framework-based solution. Hosting provider details are not discernible from the HTML content. Overall, the technical infrastructure supports the business needs but should be enhanced with modern security and accessibility best practices.
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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