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Security report for gumdo.cz

Ge-Baek Hosin Sool · Other · Czech Republic

Medium risk. 9 critical or high findings in GDPR outside view, Email security and 2 other checks.

Security score

58/100

Risk levelMedium

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

The website www.gumdo.cz represents a small martial arts school specializing in Haidong Gumdo, a Korean sword martial art. The site provides detailed information about the art's history, training schedules, membership fees, and upcoming events. The business targets martial arts enthusiasts primarily in the Czech Republic and operates as a niche educational and training provider. The site is professionally designed with clear navigation and mobile responsiveness, supporting a positive user experience. Technically, it leverages ASP.NET backend, Bootstrap frontend components, and Google Analytics for visitor tracking. Security posture is moderate with HTTPS usage but lacks explicit security headers and privacy policies. Contact information is clearly presented, enhancing business credibility. However, the absence of WHOIS data limits transparency about domain ownership. Overall, the site is functional and trustworthy for its audience but could improve privacy and security disclosures.

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

9 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 gumdo.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.

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
15
Email security
60
DNS health
75
Network security
100
GDPR outside view
25
Average
58

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 gumdo.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for gumdo.cz right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

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 business operates as a specialized martial arts school with a focused niche in Haidong Gumdo. It maintains partnerships with related martial arts schools, enhancing its network and credibility. Revenue streams likely include membership fees, training sessions, seminars, and event participation. The target customer segment includes individuals of all ages interested in Korean sword martial arts. Growth indicators include regular event scheduling and active content updates. The partnership ecosystem includes several Czech martial arts organizations, suggesting collaborative opportunities. The business model is educational and community-oriented, with a small but dedicated user base.

Security posture

The website demonstrates a basic to moderate security maturity level. HTTPS is implemented, ensuring encrypted communication. However, the absence of security headers such as Content Security Policy, HSTS, and X-Frame-Options reduces protection against common web attacks. No incident response or vulnerability disclosure information is provided, which limits transparency and preparedness. The use of Google Analytics introduces moderate user tracking without visible consent mechanisms, potentially impacting privacy compliance. No exposed sensitive data or vulnerable libraries were detected in the HTML content. Overall, the security posture is adequate for a small educational site but requires enhancements to meet best practices and regulatory compliance.

Recommendations

  1. Implement comprehensive privacy and cookie consent policies to comply with GDPR and enhance user trust.
  2. Add security headers including Content Security Policy, HSTS, X-Frame-Options, and X-XSS-Protection to strengthen site security.
  3. Publish a vulnerability disclosure policy and incident response contact information to improve transparency and readiness.
  4. Conduct regular security audits of third-party scripts and libraries to mitigate potential vulnerabilities.
  5. Enhance accessibility features and SEO optimization to improve user experience and search engine ranking.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Ge-Baek Hosin Sool
Description
Škola Hwang-Yong bojového umění Haidong Gumdo, historie a kde se konají tréninky.
Key services
Martial arts training sessions, Seminars and workshops, Membership and grading exams, Event organization
Content quality
good
Branding
moderate

Technology

Stack
ASP.NET (asp:placeholder tags), jQuery (implied by $ usage), Google Analytics, Bootstrap (dropdown menus, classes), AOS (Animate On Scroll library)
Frameworks
ASP.NET
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
65/100
Good practices seen
  • Use of HTTPS (implied by URL https://www.gumdo.cz/)
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
basic

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with rich content about Haidong Gumdo martial arts.
  2. No WHOIS data available, indicating privacy protection or domain registration issues.
  3. No explicit privacy policy found, but cookie policy page exists without consent mechanism.
  4. Contact information is clearly provided with email and phone number.
  5. No security policy, incident response, or vulnerability disclosure information present.
  6. Use of Google Analytics for tracking without visible cookie consent banner.
  7. Website uses modern frontend libraries and is mobile responsive.
  8. No suspicious or malicious content detected.
  9. No advertising networks detected except Google Analytics tracking.
Technical notes

Notes

The website is built on ASP.NET with frontend technologies including Bootstrap and AOS for animations. Google Analytics is used for visitor tracking. The site is mobile responsive and has a clear navigation structure. Performance is moderate, with no major issues detected in the HTML content. There is no detected CMS, suggesting a custom or semi-custom platform. Hosting provider details are not disclosed. The site could benefit from improved accessibility compliance and SEO enhancements. Technical debt appears low but could be reduced further by modernizing some frontend components and improving security configurations.
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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