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Security report for dek.cz

Dek a.s. · Retail · Czech Republic

Medium risk. 6 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

69/100

Risk levelMedium

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

Dek a.s. operates the website dek.cz, a leading retail network specializing in building materials, tools, and construction supplies in the Czech Republic. Established in 2004, the company has grown to become the largest building materials network in the country, with 94 physical stores and an online presence offering product catalogs, pricing, and rental services. The website targets construction professionals and general consumers seeking building and renovation materials. The business model focuses on retail sales combined with tool and machine rental services, positioning Dek a.s. as a comprehensive supplier in the construction sector. Technically, the website employs modern web technologies including Vue.js and React frameworks, alongside jQuery and various asynchronous scripts for analytics and marketing. Hosting is provided by Active24, consistent with WHOIS data. The site demonstrates good mobile optimization and moderate performance, with SEO and accessibility features at a basic to good level. The use of multiple tracking and advertising services indicates a mature digital marketing strategy. From a security perspective, the site enforces HTTPS and uses secure login forms with validation. However, it lacks explicit security headers and publicly accessible privacy or cookie policies, which are critical for GDPR compliance and user trust. No incident response or vulnerability disclosure information is available, suggesting room for improvement in transparency and security governance. Overall, dek.cz presents a professional and trustworthy online platform with strong business credibility and technical infrastructure. To enhance its security posture and compliance, the company should implement and publish comprehensive privacy and cookie policies, add security headers, and provide clear incident response channels. These steps will improve user trust and align the site with best practices in data protection and cybersecurity.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 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

6 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

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, LinkedIn, YouTube, Google APIs

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

  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 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 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 dek.cz

This scan found 20 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

Email alerts on material changes and an exportable JSON history of every change.

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Full report

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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
35
Email security
82
DNS health
85
Network security
100
GDPR outside view
40
Average
69

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

Dek a.s. holds a dominant market position in the Czech building materials retail sector, leveraging a large network of physical stores and an integrated online platform. Its competitive advantage lies in the breadth of product offerings, including construction materials, electrical supplies, plumbing, and tools rental. The business model combines traditional retail with digital commerce and service extensions like equipment rental, catering to both professional contractors and individual consumers. The company’s growth is supported by extensive regional coverage across Czech regions, as evidenced by the detailed store locator and regional segmentation on the website. Strategic partnerships with major brands and use of affiliate marketing programs enhance its product portfolio and market reach. The digital infrastructure supports targeted marketing and customer analytics, indicating a data-driven approach to customer engagement and sales optimization.

Security posture

The website demonstrates a moderate to good security maturity level with HTTPS enforced and secure login forms featuring client-side validation. The use of asynchronous loading for analytics and marketing scripts reduces performance impact but introduces potential risks if third-party scripts are compromised. The absence of explicit security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security is a notable gap that could expose the site to clickjacking, XSS, and other web attacks. Lack of publicly available privacy and cookie policies, as well as incident response or vulnerability disclosure information, indicates limited transparency and preparedness for security incidents. No vulnerabilities or exposed sensitive data were detected in the provided content. To improve, Dek a.s. should implement comprehensive security headers, publish privacy and cookie policies, and establish clear incident response and vulnerability reporting channels to enhance user trust and regulatory compliance.

Recommendations

  1. Publish comprehensive privacy and cookie policies prominently on the website to ensure GDPR compliance and user transparency.
  2. Implement security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to strengthen web security.
  3. Establish and publicize an incident response plan and vulnerability disclosure policy to improve security governance and user confidence.
  4. Conduct regular audits of third-party scripts and dependencies to mitigate risks from external resources.
  5. Enhance accessibility features and mobile optimization to improve user experience and compliance with accessibility standards.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Dek a.s.
Description
Vše pro vaši stavbu či rekonstrukci na jednom místě a ihned skladem. Jsme největší síť stavebnin s 94 prodejnami a vlastní půjčovnou strojů a nářadí.
Key services
Building materials sales, Tool and machine rental, Online product catalog and ordering
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Vue.js, React, jQuery, Google Tag Manager, Microsoft Clarity, Smartform API
Frameworks
Vue.js, React
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Use of Google Tag Manager and Microsoft Clarity asynchronously
  • No exposed sensitive data in HTML
  • Login form with validation rules

Analytics and tracking

Services
Microsoft Clarity, Google Analytics (via GTM), Exponea
Tracking level
extensive
Privacy practices
basic

Advertising

Ad networks
Bing Ads, Google Ads
Tracking pixels
Microsoft Clarity, Bing UET
Marketing tools
Smartform, Exponea
Transparency
good

Site quality

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

Key observations

  1. Website is a professional e-commerce platform for building materials in Czech Republic.
  2. No privacy or cookie policy pages found in the provided content.
  3. Multiple tracking and marketing scripts are used, indicating extensive user analytics and advertising.
  4. Contact phone number and login form are present, but no explicit contact email found in visible content.
  5. WHOIS data is consistent and domain is long-established.
  6. No security.txt or vulnerability disclosure information found.
  7. No security headers explicitly detected in provided data.
  8. Website uses modern JavaScript frameworks (Vue.js, React) and asynchronous loading for performance.
  9. Mobile optimization appears good with responsive design elements.
  10. No adult or questionable content detected.
Technical notes

Notes

The website utilizes a modern technology stack including Vue.js and React frameworks, supported by jQuery and various asynchronous scripts for analytics and marketing. Hosting is managed by Active24, consistent with domain registration data. The site features responsive design elements for mobile optimization and employs Google Tag Manager and Microsoft Clarity for user behavior tracking. Performance is moderate, with asynchronous script loading to reduce blocking. SEO is supported by appropriate meta tags and Open Graph data. However, the absence of a detected CMS suggests a custom or proprietary platform. Accessibility is basic, with room for improvement. The technical infrastructure is robust but could benefit from enhanced security configurations and formalized privacy compliance mechanisms.
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

Earlier scans of this domain

  1. 67/100Medium29 findingsView report
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