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Security report for sportschule-tennis.ch

Sportschule Tennis Academy GmbH · Other · Switzerland

Medium risk. 8 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

50/100

Risk levelMedium

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

Sportschule Tennis Academy GmbH operates a specialized tennis training and facility business in Switzerland, targeting a broad audience from toddlers to seniors and from beginners to top athletes. The website presents core services including a tennis academy and indoor tennis halls with multiple courts and an indoor golf facility. The business is positioned as a local sports education and facility provider with a small company size and a focused service offering. Technically, the website is built on the Flectra CMS platform, utilizing modern web technologies such as Google Analytics and Google Tag Manager for user tracking. The site is moderately optimized for mobile devices and has basic SEO and accessibility features. Performance is moderate with no critical technical issues detected. However, the site lacks advanced security headers and explicit privacy or cookie policies. From a security perspective, HTTPS is enabled and CSRF tokens are present in scripts, indicating some security awareness. Nonetheless, the absence of security headers, privacy policies, and incident response contacts represents gaps in compliance and security maturity. No vulnerabilities or exposed sensitive data were detected in the provided content. Overall, the website is functional and moderately professional but requires improvements in privacy compliance, security best practices, and contact transparency to enhance trust and regulatory adherence.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
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

8 findings rated critical or high. Fix these first.

  1. 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';…

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • 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

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

Keep watching sportschule-tennis.ch

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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
62
Security headers
15
Email security
70
DNS health
80
Network security
40
GDPR outside view
35
Average
50

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

The company targets tennis players and sports enthusiasts in Switzerland, offering coaching and facility rental services. Its competitive advantage lies in providing a comprehensive tennis academy experience alongside modern indoor facilities. The business model is service-oriented with potential revenue streams from coaching fees and facility rentals. The presence of dedicated subdomains for academy and hall services indicates a segmented approach to service delivery. Growth potential exists through expanding digital presence and formalizing privacy and security policies. The partnership ecosystem appears limited to internal subdomains and the Flectra platform provider.

Security posture

The current security posture is moderate with HTTPS enabled and some security scripting practices like CSRF tokens. However, the lack of security headers such as Content-Security-Policy and absence of privacy and cookie policies reduce compliance with GDPR and other regulations. No incident response or vulnerability disclosure information is provided, limiting readiness for security events. The use of third-party analytics introduces moderate user tracking without visible consent mechanisms, posing privacy risks. Overall, the security culture appears basic and would benefit from formalized policies and enhanced technical controls.

Recommendations

  1. Implement and publish comprehensive privacy and cookie policies with explicit user consent mechanisms to improve GDPR compliance.
  2. Add security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  3. Provide clear contact information including emails and phone numbers for general inquiries and security incidents to improve transparency and trust.
  4. Conduct regular vulnerability assessments of third-party libraries and CMS components to identify and remediate potential security risks.
  5. Enhance accessibility features and SEO optimization to improve user experience and search engine visibility.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Sportschule Tennis Academy GmbH
Description
Sportschule Tennis Academy GmbH offers tennis coaching and facilities from beginners to top athletes, including a tennis academy and indoor tennis halls with multiple courts and an indoor golf facility.
Key services
Tennis coaching, Tennis academy, Indoor tennis hall rental, Indoor golf facility
Content quality
basic
Branding
moderate

Technology

Stack
Google Analytics, Google Tag Manager, FontAwesome, Flectra
Frameworks
Flectra
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
60/100
Good practices seen
  • HTTPS enabled
  • CSRF token present in scripts

Analytics and tracking

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

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website uses Flectra CMS platform with integrated e-commerce capabilities though no active shop detected.
  2. No privacy, cookie, or terms of service policies found on the website.
  3. No contact emails, phone numbers, or physical addresses explicitly listed on the homepage or footer.
  4. Google Analytics and Google Tag Manager are used for tracking user behavior.
  5. No security headers detected in the HTML content; HTTPS is enabled.
  6. No forms detected on the homepage; login link present but no registration or contact forms visible.
  7. Open Graph and Twitter card metadata present for social sharing.
  8. Site content is in German (Switzerland) language.
  9. No social media links explicitly found in the HTML content.
  10. No explicit security or incident response information provided.
Technical notes

Notes

The website uses the Flectra CMS platform, which integrates e-commerce and content management capabilities. The tech stack includes Google Analytics and Google Tag Manager for tracking, and FontAwesome for icons. The site loads asynchronously loaded scripts and uses deferred JavaScript to optimize performance. Mobile optimization is good, but accessibility features are basic. SEO metadata such as Open Graph and Twitter cards are present but limited. No advanced hosting or CDN information is available. The site performance is moderate with no critical technical debt observed. Opportunities exist to modernize security headers and improve privacy compliance.
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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