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Security report for gsklub.cz

GSKlub.cz · Retail · Czech Republic

Medium risk. 4 critical or high findings in Security headers and SSL/TLS.

Security score

74/100

Risk levelMedium

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

GSKlub.cz is a Czech Republic-based e-commerce platform specializing in the sale of dietary supplements. It positions itself as one of the largest online sellers in its market segment, offering exclusive products for all age groups directly from manufacturers. The website is built on WordPress with WooCommerce, leveraging a range of modern marketing and analytics tools such as Google Analytics, Hotjar, and Meta Pixel. The site implements a comprehensive cookie consent mechanism via Cookiebot, reflecting a commitment to privacy compliance. However, the absence of a visible privacy policy and WHOIS data gaps present some concerns regarding transparency and domain legitimacy. Technically, the site is well-structured, mobile-optimized, and uses HTTPS, but could improve security headers and explicit privacy documentation.

Scanned

NIS2 and GDPR posture

GDPR outside view
88/ 100 · Low
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

4 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. 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.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

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

Keep watching gsklub.cz

This scan found 19 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.

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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
95
DNS health
85
Network security
100
GDPR outside view
88
Average
74

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 business operates in the retail sector focusing on health and wellness products, specifically dietary supplements. Its business model is e-commerce, targeting a broad general audience in the Czech Republic. The company leverages digital marketing extensively, utilizing multiple ad networks and tracking services to optimize customer engagement and sales. The lack of explicit contact information and privacy policy pages may impact customer trust and regulatory compliance. The company appears medium-sized with consistent branding and good content quality, but the missing WHOIS data and privacy documentation could be a risk factor in competitive and regulatory environments.

Security posture

The website demonstrates a moderate to good security posture with HTTPS enforced and cookie consent implemented. However, the absence of explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options is a gap that should be addressed to enhance protection against common web attacks. No vulnerabilities or exposed sensitive data were detected in the HTML content. The use of third-party scripts and analytics tools is extensive, which requires ongoing monitoring for vulnerabilities. Incident response and security policy information are not publicly available, indicating potential gaps in transparency and preparedness.

Recommendations

  1. Implement and enforce comprehensive security headers including CSP, X-Frame-Options, and X-Content-Type-Options.
  2. Publish a clear and comprehensive privacy policy page to improve GDPR compliance and user trust.
  3. Obtain and publish WHOIS domain registration data or ensure domain registration information is accessible to improve legitimacy.
  4. Regularly audit and update all third-party plugins and scripts to mitigate vulnerabilities.
  5. Consider publishing security policy and incident response contact information to enhance transparency and readiness.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
GSKlub.cz
Description
Jsme jedním z největších internetových prodejců doplňků stravy na českém trhu. Nabízíme exkluzivní produkty pro všechny věkové kategorie přímo od výrobce.
Key services
online sales of dietary supplements, exclusive products for all age groups
Content quality
good
Branding
consistent

Technology

Stack
jQuery 2.2.4, WooCommerce, Google Tag Manager, Cookiebot, Hotjar, Luigis Box, Google Analytics, Meta Pixel
Frameworks
WordPress
Platforms
WooCommerce
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Hotjar, Luigis Box
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Google Ads, Meta (Facebook) Ads
Tracking pixels
Meta Pixel, Hotjar, Luigis Box
Marketing tools
Targito
Transparency
good

Site quality

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

Key observations

  1. Website is a Czech e-commerce platform specializing in dietary supplements.
  2. Uses WordPress with WooCommerce for e-commerce functionality.
  3. Implements cookie consent via Cookiebot with detailed cookie categorization.
  4. Extensive use of third-party analytics and marketing tools.
  5. No visible contact emails or phone numbers on homepage HTML content.
  6. WHOIS data unavailable, which is a concern for domain legitimacy verification.
  7. No privacy policy or terms of service pages explicitly found in the HTML content.
  8. Website is fully accessible with no WAF or blocking detected.
Technical notes

Notes

The website is built on a WordPress CMS platform with WooCommerce for e-commerce functionality. It uses jQuery 2.2.4 and integrates multiple third-party services including Google Tag Manager, Cookiebot, Hotjar, and Luigis Box. The site is mobile-optimized and uses modern fonts and caching mechanisms. Performance is moderate with room for improvement in loading speed and accessibility features. SEO is supported by proper meta tags and structured data in JSON-LD format. Hosting provider details are not explicitly found. The technical stack is typical for mid-sized e-commerce sites but requires continuous maintenance to ensure security and performance.
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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