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Security report for jex.cz

Technology · N/a

Low risk. 1 critical or high finding in Security headers.

Security score

82/100

Risk levelLow

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

The website sedo.com is a domain parking and sales platform listing the domain jex.cz for purchase. It operates as a marketplace for domain investors and buyers, providing domain brokerage and parking services. The platform is well-established, with the domain registered since 1998, indicating a mature presence in the domain aftermarket industry. The website uses modern web technologies including JavaScript modules and Cloudflare DNS, and enforces HTTPS for secure communications. However, the content is basic, primarily serving as a landing page for domain sales without extensive business or contact information. Security posture is good with standard headers and HTTPS, but lacks DNSSEC and explicit security policies. Privacy compliance is limited, with no privacy or terms of service pages detected, though a cookie consent banner is present. Overall, the site is safe, professional, and trustworthy for its purpose but could improve transparency and compliance 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

1 finding 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 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 jex.cz

This scan found 15 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

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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
100
Security headers
50
Email security
70
DNS health
85
Network security
100
GDPR outside view
88
Average
82

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

Sedo.com positions itself as a leading domain aftermarket platform, targeting domain investors and buyers globally. Its business model revolves around domain sales, parking, and brokerage services, generating revenue through commissions and parking fees. The platform benefits from a large inventory and established market presence since 1998. Competitive advantages include a broad domain portfolio and integration with Cloudflare for performance and security. The lack of explicit company contact details and privacy policies suggests a focus on automated domain transactions rather than direct customer engagement. Growth indicators include ongoing domain listings and partnerships. The ecosystem includes domain registrars and DNS providers, with World4You Internet Services GmbH as the registrar for the domain in question.

Security posture

The website demonstrates a solid security foundation with HTTPS enabled and multiple security headers implemented, including HSTS, X-Frame-Options, and Content-Security-Policy. The domain status clientTransferProhibited protects against unauthorized transfers. However, DNSSEC is not enabled, representing a potential DNS security gap. No vulnerabilities or exposed sensitive data were detected in the analyzed content. The absence of published security policies or incident response contacts limits transparency and readiness communication. Privacy compliance is minimal, with no GDPR-specific disclosures found. Overall, the security posture is good but could be enhanced by enabling DNSSEC and publishing comprehensive security and privacy documentation.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish a comprehensive privacy policy and terms of service to improve compliance and user trust.
  3. Provide clear contact information including security incident response contacts to enhance transparency.
  4. Implement and disclose security policies and certifications to strengthen security posture.
  5. Improve website content quality and navigation to enhance user experience and SEO.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
Domain parking and sales platform listing domain jex.cz for sale.
Key services
Domain sales, Domain parking, Domain brokerage
Content quality
basic
Branding
consistent

Technology

Stack
JavaScript ES Modules, CSS3, Cloudflare DNS
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited status on domain
  • No DNSSEC enabled (recommend enabling)

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

Design
basic
User experience
basic
Content relevance
basic
Navigation
basic
Professionalism
basic
Trustworthiness
moderate

Key observations

  1. Website is a domain parking and sales landing page for jex.cz
  2. No privacy policy or terms of service pages found
  3. Cookie consent banner present and functional
  4. No contact information or business details explicitly provided
  5. Uses HTTPS and Cloudflare DNS for security
  6. No signs of adult or malicious content
  7. WHOIS data is complete and consistent with domain marketplace usage
Technical notes

Notes

The website uses modern web technologies including JavaScript ES modules and CSS3, served via a CDN (cdn.sedo.com). Hosting is provided by World4You Internet Services GmbH, with DNS managed by Cloudflare, indicating a robust infrastructure. The site is mobile optimized with responsive design and uses standard web fonts. Performance is moderate with no major issues detected. Accessibility features are basic, and SEO optimization is minimal but present. The site lacks a CMS indication, suggesting a custom or proprietary platform. No analytics or tracking scripts were detected in the provided content, indicating minimal user tracking. Overall, the technical implementation is solid but could benefit from enhanced SEO and accessibility improvements.
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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