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Security report for decathlon.pl

Decathlon sp. z o.o. · Retail · Poland

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

Security score

65/100

Risk levelMedium

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

Decathlon.pl is the Polish online presence of Decathlon, a large international sports retail company. The website offers a comprehensive e-commerce platform featuring sports equipment, apparel, and accessories across more than 60 disciplines. It also integrates additional services such as a loyalty program, equipment rental, buy-back of used goods, and a dedicated mobile application, positioning itself as a full-service sports retail ecosystem in Poland. The site is professionally designed with excellent content quality and user experience, targeting sports enthusiasts and general consumers in Poland.

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

8 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

  2. 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 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 decathlon.pl

This scan found 22 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
57
Security headers
65
Email security
75
DNS health
80
Network security
100
GDPR outside view
10
Average
65

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 decathlon.pl, from OffSeq Breach.

Total records
19,567
Employees
0
Customers
19,522
Third parties
45
Weak passwords
10%

21 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for decathlon.pl.

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Breach keeps ingesting new leaks, so these numbers can grow between scans.

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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 a large-scale retail business with a strong market position in Poland and globally. The business model focuses on direct online sales complemented by value-added services like loyalty rewards and rental options, enhancing customer retention and engagement. The company leverages partnerships and subsidiary platforms to extend its service offerings. The presence of multiple branded domains and integration with trusted payment and delivery partners indicates a mature and well-structured operational ecosystem. The target customer segment is broad, including individual consumers interested in sports and outdoor activities.

Security posture

The website demonstrates a strong security posture with enforced HTTPS, comprehensive security headers, and secure form handling including CSRF protection. The presence of a vulnerability disclosure platform and security contact channels indicates a proactive approach to security management. No critical vulnerabilities or exposed sensitive data were detected. Privacy compliance is robust with clear GDPR-aligned policies and cookie consent mechanisms. However, the lack of publicly available WHOIS data due to privacy protection is noted but justified given the business type. Overall, the security maturity is high with recommendations to maintain library updates and enhance direct security contact visibility.

Recommendations

  1. Maintain up-to-date third-party libraries and dependencies to mitigate vulnerabilities.
  2. Continue enforcing and monitoring security headers and HTTPS configurations.
  3. Enhance visibility and accessibility of direct security contact emails for incident reporting.
  4. Regularly audit privacy and cookie consent mechanisms to ensure ongoing GDPR compliance.
  5. Invest in continuous performance and accessibility improvements to sustain excellent user experience.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Decathlon sp. z o.o.
Description
Sklep sportowy oferujący sprzęt, odzież, buty i akcesoria do ponad 60 dyscyplin sportowych. Oferta obejmuje sprzedaż online i usługi dodatkowe takie jak program lojalnościowy, wypożyczalnia sprzętu, serwis i sprzedaż używanego sprzętu.
Key services
Online retail of sports goods, Loyalty program, Equipment rental, Buy-back of used equipment, Mobile application
Content quality
excellent
Branding
consistent

Technology

Stack
React, Algolia, Google Tag Manager, Adjust, Synerise, Woosmap
Frameworks
React
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Security headers present
  • Secure forms with CSRF tokens
  • Vulnerability disclosure page available

Analytics and tracking

Services
Google Analytics, Synerise
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Adjust
Tracking pixels
Adjust, Synerise
Marketing tools
Synerise
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking detected.
  2. WHOIS data is unavailable due to privacy protection or registry restrictions.
  3. Strong privacy and cookie policies with GDPR compliance.
  4. Multiple external trusted domains linked, including official brand and service domains.
  5. Security headers and HTTPS are properly implemented.
  6. Comprehensive e-commerce platform with loyalty and service offerings.
  7. No suspicious or malicious content detected.
  8. Mobile and desktop versions are well optimized.
  9. Use of modern technologies and analytics tools.
Technical notes

Notes

The website is built using modern web technologies including React for frontend rendering, Algolia for search, and integrates analytics and marketing tools such as Google Tag Manager, Adjust, and Synerise. The platform is optimized for both desktop and mobile devices, delivering fast load times and responsive design. Accessibility features are implemented to a good standard, and SEO optimization is evident through proper meta tags and structured data. The technical infrastructure supports a complex e-commerce environment with multiple integrated services and external domains, reflecting a mature and scalable digital platform.
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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