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Security report for muziker.cz

Muziker a.s. · Retail · Czech Republic

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

Security score

71/100

Risk levelMedium

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

Muziker a.s. operates a large e-commerce platform specializing in musical instruments, audio/video equipment, and related accessories. The company has a strong market presence in the Czech Republic and multiple international markets, supported by country-specific domains. The website offers a broad product catalog with professional customer service and a 25-year market history, positioning it as a reputable retailer in its sector. Technically, the site uses modern JavaScript frameworks and tracking tools, with good mobile optimization and SEO practices. Security posture is solid with HTTPS enforced and cookie consent implemented, though explicit security headers and privacy policies are lacking. The absence of WHOIS data suggests privacy protection, which is common for e-commerce businesses but reduces transparency. Overall, the site is professional, trustworthy, and safe for general audiences.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 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

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

      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

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, LinkedIn, YouTube

      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 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 muziker.cz

This scan found 18 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
65
Security headers
75
Email security
75
DNS health
85
Network security
100
GDPR outside view
25
Average
71

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 muziker.cz, from OffSeq Breach.

Total records
3,796
Employees
0
Customers
3,796
Third parties
0
Weak passwords
23%

11 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 muziker.cz.

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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

Muziker's business model focuses on retail e-commerce for musical instruments and leisure products, targeting consumers and professionals in music and audio sectors. Its competitive advantage lies in its extensive product range, international reach, and long-standing market presence. The company leverages multiple country-specific domains to localize offerings and expand market penetration. Revenue streams likely include direct product sales and possibly related services such as showroom visits. The partnership ecosystem includes technology providers for analytics and customer engagement. Growth indicators include active international domains and modern digital infrastructure. Strategic observations suggest opportunities to enhance transparency and compliance by publishing detailed privacy and security policies.

Security posture

The website demonstrates a moderate to good security maturity level with HTTPS enforced and cookie consent mechanisms in place. However, the lack of explicit security headers such as Content Security Policy (CSP), HSTS, and X-Frame-Options reduces defense-in-depth. No vulnerabilities or exposed sensitive data were detected in the provided content. Compliance gaps include missing visible privacy policies and incident response contacts, which are important for GDPR and general security best practices. The absence of a security.txt file or vulnerability disclosure policy limits the site's transparency and responsiveness to security issues. Overall, the security posture is adequate but could be improved with additional controls and documentation.

Recommendations

  1. Implement and publish a comprehensive privacy policy and terms of service to enhance compliance and user trust.
  2. Add security headers including CSP, HSTS, and X-Frame-Options to strengthen protection against common web attacks.
  3. Provide clear contact information for security incident reporting and consider publishing a security.txt file.
  4. Enhance accessibility features and conduct regular security audits to identify and remediate potential vulnerabilities.
  5. Increase transparency around data collection, retention policies, and user privacy to align with GDPR and best practices.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Muziker a.s.
Description
Vše pro volný čas ✓ Garance nejlepší ceny ✓ Rychlá doprava ✓ Vrácení zboží až do 30 dnů ✓ Profesionální zákaznický servis ✓ 25 let na trhu
Key services
Online sales of musical instruments, Audio and video equipment, Accessories and merchandise, Customer support and showroom services
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Sentry, Stimulus JS, Luigisbox, XMLHttpRequest
Frameworks
Stimulus JS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented

Analytics and tracking

Services
Google Tag Manager, Sentry
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Sentry
Marketing tools
Luigisbox, Coworkers AI Bot
Transparency
basic

Site quality

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

Key observations

  1. Website is a large e-commerce platform specializing in musical instruments and related products.
  2. Content is in Czech language with multiple international domain versions.
  3. No WHOIS data available, indicating privacy protection or registry restrictions.
  4. HTTPS is enforced and cookie consent is implemented.
  5. No explicit privacy policy or terms of service found in the provided HTML snapshot.
  6. No direct contact emails or phone numbers found in the HTML snapshot.
  7. Use of modern JavaScript frameworks and tracking tools is evident.
  8. No signs of adult or unsafe content.
  9. No WAF or blocking mechanisms detected.
Technical notes

Notes

The website uses a modern JavaScript-based tech stack including Stimulus JS, Google Tag Manager, and Sentry for error tracking. It leverages external CDNs for assets and fonts, and integrates third-party services such as Luigisbox and Coworkers AI Bot for marketing and customer engagement. Performance is moderate with deferred script loading and preconnect hints. Mobile optimization is good with responsive design elements. SEO is supported by proper meta tags and Open Graph data. However, the site lacks explicit CMS identification and hosting provider details. Technical risks include missing security headers and incomplete privacy documentation, which could impact compliance and security posture.
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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