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Security report for grandwin-cz.cz

Bellona N.V. · Hospitality · N/a

Medium risk. 10 critical or high findings in GDPR outside view, Email security and 2 other checks.

Security score

56/100

Risk levelMedium

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

Grandwin CZ is an international online casino operated by Bellona N.V., licensed under Curacao eGaming, targeting Czech players with a comprehensive offering of casino games and sports betting. The website is professionally designed, mobile-optimized, and provides a rich user experience with detailed information on games, bonuses, and payment methods. Technically, it is built on WordPress with modern libraries and uses Cloudflare for DNS and security. Security posture is good with HTTPS and CSP headers, though additional security headers and privacy compliance mechanisms could be improved. The domain is recently registered but consistent with the business operator. Overall, Grandwin CZ presents a trustworthy and competitive online gambling platform for its target market.

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

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 grandwin-cz.cz

This scan found 25 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

Email alerts on material changes and an exportable JSON history of every change.

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Full report

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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
75
Security headers
15
Email security
60
DNS health
75
Network security
100
GDPR outside view
10
Average
56

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

Grandwin CZ operates in the hospitality sector focusing on online gambling and sports betting. It leverages a business model combining casino games and sportsbook under one user account, offering attractive bonuses and multiple payment options including cryptocurrencies. The company targets Czech adult players, providing localized content and support. Partnerships with responsible gambling organizations and game providers enhance its market credibility. The recent domain registration suggests a new branding or domain migration. The platform shows signs of growth and solid market positioning within the Czech online gambling industry.

Security posture

The website enforces HTTPS and includes a Content-Security-Policy header, indicating a baseline security posture. No critical vulnerabilities or exposed sensitive data were detected. However, the absence of additional security headers (e.g., HSTS, X-Frame-Options) and lack of published security or incident response policies represent areas for improvement. The site does not currently provide a vulnerability disclosure program or security.txt file. Customer support is available via email and 24/7 live chat, but no dedicated security contact is published. Overall, the security maturity is moderate with room for enhancement to meet best practices and compliance standards.

Recommendations

  1. Implement a cookie consent banner and mechanism to ensure GDPR compliance.
  2. Add additional security headers such as Strict-Transport-Security, X-Frame-Options, and X-XSS-Protection.
  3. Publish a formal security policy and incident response contact information on the website.
  4. Consider establishing a vulnerability disclosure program and hosting a security.txt file.
  5. Regularly audit and update third-party plugins and scripts to mitigate potential vulnerabilities.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Bellona N.V.
Description
Grandwin je mezinárodní online kasino s platnou licencí Curacao eGaming, které nabízí českým hráčům širokou nabídku her včetně automatů, rulety, živých her a sportovního sázení. Poskytuje uvítací bonusy, různé platební metody včetně kryptoměn a webovou mobilní aplikaci.
Key services
Online kasino hry (automaty, ruleta, blackjack, poker, herní show), Živé kasino s živými dealery, Sportovní sázení včetně esportů a virtuálních sportů, Uvítací a pravidelné bonusy, Rychlé vklady a výběry, Zákaznická podpora 24/7 online chatem
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress 6.8.1, jQuery 3.7.1, Cloudflare DNS, Google Fonts, Easy Table of Contents plugin, All in One SEO plugin
Frameworks
WordPress
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Content-Security-Policy header present
  • No exposed sensitive data in HTML
  • Secure forms with minimal data collection

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

Advertising

Marketing tools
All in One SEO
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no WAF blocking.
  2. Content is professionally presented and comprehensive about the casino services.
  3. Strong focus on Czech market with Czech language content and localized offers.
  4. No phone contact found; only email and contact form available.
  5. No cookie consent banner detected, which may be a compliance gap.
  6. Security headers are minimal but present; HTTPS enforced.
  7. No explicit security or incident response policies published.
  8. Mobile experience is optimized via web app; no native app available.
  9. WHOIS data is consistent with business claims except for recent domain creation date.
  10. No suspicious or malicious content detected.
Technical notes

Notes

The website is built on WordPress 6.8.1 with jQuery and uses popular plugins like All in One SEO and Easy Table of Contents. It loads Google Fonts and is served behind Cloudflare DNS and nameservers, enhancing performance and security. The site is mobile-optimized via a web app approach rather than native apps. Performance is fast with modern HTML and CSS standards. SEO is well addressed with meta tags and structured data in JSON-LD format. Accessibility is good with semantic HTML and ARIA roles. Technical risks include reliance on third-party plugins and minimal security headers, which should be monitored and improved.
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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