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Security report for decathlon.ch

Decathlon · Retail · Switzerland

Medium risk. 5 critical or high findings in SSL/TLS, GDPR outside view and 1 other check.

Security score

59/100

Risk levelMedium

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

Decathlon is a large international retailer specializing in sports equipment and apparel, with a strong presence in Switzerland as evidenced by this localized splash page. The website serves as a language selection gateway, offering German and French options, and is designed with a professional and consistent brand identity. The technical infrastructure includes modern web technologies such as JavaScript, CSS, JSON-LD structured data, and integration with third-party marketing and tracking services like Ysance DMP and TagCommander. Performance optimizations such as font preloading and responsive design are present, contributing to a good user experience. Security posture is adequate with HTTPS enforced and no visible sensitive data exposure; however, the absence of explicit security headers and privacy/cookie policies indicates room for improvement in compliance and security best practices. Overall, the site is trustworthy and professionally maintained but would benefit from enhanced transparency and security controls.

Scanned

NIS2 and GDPR posture

GDPR outside view
50/ 100 · Medium
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

5 findings rated critical or high. Fix these first.

  1. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  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

    • 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

  3. DNS health

    DNS sends visitors and email to the right servers. Misconfigured records can cause outages or let someone redirect your traffic.

    • High

      Potential Subdomain Takeover

      Subdomain api.decathlon.ch points to unregistered service api-decathlon-ch-1838332290.eu-west-1.elb.amazonaws.com

      What to do: Remove or fix CNAME record to prevent subdomain takeover

      • WSTG-CONF-10
      • NIS2 21(2)(i)
      • IR 2024/2690 12.4: Implementing Regulation (EU) 2024/2690, Annex point 12.4: Asset inventory
      • NIST CM-8: NIST SP 800-53 Rev. 5 CM-8: System Component Inventory

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

Keep watching decathlon.ch

This scan found 16 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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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
0
Security headers
80
Email security
70
DNS health
55
Network security
100
GDPR outside view
50
Average
59

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

Decathlon operates in the retail sector focusing on sports goods, targeting a broad general audience interested in over 100 sports. The business model combines e-commerce with physical stores, leveraging localized websites for different countries and languages. The company benefits from strong brand recognition and consistent branding across its digital assets. The presence of advanced marketing tools and data management platforms suggests a mature digital marketing strategy. However, the lack of visible contact information and compliance documentation on this splash page may limit direct customer engagement and regulatory transparency. The company likely has a broad partnership ecosystem but no explicit partner or subsidiary domains were detected on this page.

Security posture

The website demonstrates a baseline security posture with HTTPS enabled and no apparent exposure of sensitive data. The use of Do Not Track detection and session storage strategies for marketing data indicates some privacy awareness. However, the absence of security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options reduces protection against common web attacks. No incident response or security policy information is provided, limiting transparency and preparedness visibility. The site lacks privacy and cookie policies, which are critical for GDPR compliance and user trust. Overall, the security maturity is moderate but could be significantly improved by implementing standard security headers, publishing privacy documentation, and providing clear incident response contacts.

Recommendations

  1. Publish comprehensive privacy and cookie policies with clear GDPR compliance statements and consent mechanisms.
  2. Implement and configure security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection.
  3. Add visible and verified contact information including security incident response channels.
  4. Regularly audit and update third-party libraries and tracking scripts to mitigate vulnerabilities.
  5. Enhance transparency by linking terms of service and data protection officer contact details.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Decathlon
Description
Willkommen bei DECATHLON! #Wo dein Sport anfängt. Finde hier deine Sportausrüstung für über 100 Sportarten.
Key services
Sports equipment sales, Sports apparel sales, Multi-language website with localized content
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, CSS, HTML5, JSON-LD, Brightcove video player, Ysance DMP, TagCommander
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • No visible exposed sensitive data
  • Use of Do Not Track detection

Analytics and tracking

Services
Ysance DMP
Tracking level
moderate
Privacy practices
poor

Advertising

Tracking pixels
Ysance DMP, TagCommander
Marketing tools
Ysance DMP, TagCommander
Transparency
basic

Site quality

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

Key observations

  1. Website is a localized splash page for Decathlon Switzerland with language selection.
  2. No privacy, cookie, or terms of service pages linked or visible on this splash page.
  3. No contact information or forms present on this page.
  4. Use of modern web fonts and preloading for performance.
  5. Use of multiple JavaScript libraries and tracking services.
  6. No explicit security headers detected in provided data.
  7. No visible email addresses or phone numbers on this page.
  8. No social media links found in the HTML content provided.
  9. Site uses HTTPS and has canonical URL set.
  10. Meta robots tag set to noindex,follow indicating this page is not intended for search indexing.
Technical notes

Notes

The website uses a modern front-end stack with optimized font loading and responsive design, supporting multiple languages. Integration with third-party marketing and data management platforms like Ysance DMP and TagCommander indicates a sophisticated approach to user data and personalization. The site is served over HTTPS with canonical URLs and meta tags for SEO, although the robots meta tag disables indexing for this splash page. No CMS or hosting provider details are explicitly detected. Performance is moderate with deferred JavaScript loading and preconnect hints. Accessibility features are basic but present. The technical implementation is solid but could benefit from enhanced security configurations and more comprehensive SEO and accessibility optimizations.
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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