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Security report for cltk.cz

I. Český Lawn Tennis Klub Praha · Hospitality · Czech Republic

Medium risk. 7 critical or high findings in GDPR outside view and SSL/TLS.

Security score

57/100

Risk levelMedium

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

I. Český Lawn Tennis Klub Praha (ČLTK) is a well-established tennis club based in Prague, Czech Republic, with a domain age dating back to 2000. The club offers tennis court rentals, memberships, tennis lessons, and hosts tennis events, targeting tennis enthusiasts and players in the local region. The website is professionally designed with clear navigation and consistent branding, reflecting a focused business model centered on sports and hospitality services. Technically, the site uses MySUITU CMS and includes common JavaScript libraries such as jQuery and Slick Carousel, though some libraries are outdated which may pose security risks. The site is mobile optimized and performs moderately well.

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

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 Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • 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

    • High

      Third-party services without privacy policy

      Detected services: Facebook, Google APIs

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

Need hands-on remediation? Email guard@offseq.com

Keep watching cltk.cz

This scan found 21 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
52
Security headers
80
Email security
85
DNS health
75
Network security
40
GDPR outside view
10
Average
57

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 cltk.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for cltk.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 club operates primarily in the hospitality and sports sector, leveraging memberships and court rentals as revenue streams. It maintains partnerships with various local businesses and sponsors, as evidenced by the partner logos displayed. The target audience includes local tennis players and sports enthusiasts. The business model is service-oriented with a focus on community engagement and event hosting. The website content is relevant and professional, supporting the club's market position as a reputable local sports entity.

Security posture

The website enforces HTTPS, ensuring encrypted communications. However, it lacks important security headers such as Content-Security-Policy and X-Frame-Options, which could enhance protection against common web attacks. The use of an outdated jQuery version introduces potential vulnerabilities. No privacy or cookie policies are present, indicating compliance gaps with GDPR and related regulations. Incident response contacts and security policies are not disclosed, limiting transparency. Overall, the security posture is moderate but could be significantly improved with updated libraries, security headers, and compliance documentation.

Recommendations

  1. Implement and publish comprehensive privacy and cookie policies to improve GDPR compliance.
  2. Add security headers like Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance security.
  3. Update JavaScript libraries, especially jQuery, to the latest secure versions.
  4. Provide clear incident response contact information for security issues.
  5. Improve accessibility features and SEO optimization for better user experience and reach.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
I. Český Lawn Tennis Klub Praha
Description
A tennis club based in Prague offering tennis court rentals, club memberships, tennis lessons, and hosting tennis events.
Key services
Tennis courts rental, Club membership, Tennis lessons, Hosting tennis events
Content quality
good
Branding
consistent

Technology

Stack
jQuery 1.11.0, ResponsiveSlides.js, Slick Carousel
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
70/100
Good practices seen
  • HTTPS enforced

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. No privacy, cookie, or terms of service policies found, indicating compliance gaps.
  3. Contact information is clearly provided with phone, email, and physical address.
  4. Website uses an older version of jQuery which may pose security risks.
  5. No security headers detected, which could improve security posture.
  6. No analytics or tracking scripts detected, indicating minimal user tracking.
  7. Content is relevant and professionally presented for a local tennis club.
  8. Multiple partner logos displayed, indicating community and business relationships.
Technical notes

Notes

The website is built on MySUITU CMS and uses several JavaScript libraries including jQuery 1.11.0, ResponsiveSlides.js, and Slick Carousel for UI components. The site loads resources from its own domain and trusted CDNs. Performance is moderate with mobile optimization in place. However, the use of an outdated jQuery version is a technical debt and potential security risk. SEO is basic with meta tags and Open Graph tags present but no structured data like JSON-LD detected. Accessibility is basic and could be enhanced. No analytics or tracking scripts were detected, indicating minimal user tracking.
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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