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Security report for seznam.cz

Seznam.cz · Media · Czech Republic

Medium risk. 6 critical or high findings in GDPR outside view and DNS health.

Security score

63/100

Risk levelMedium

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

Seznam.cz is the leading Czech internet portal offering a wide range of services including a search engine, email, news, weather forecasts, and various other content and utility links. It holds a strong market position as the most visited Czech internet site, targeting Czech-speaking users seeking comprehensive online services. The business model is primarily advertising-supported, leveraging its extensive user base and content offerings. Technically, the website employs modern web technologies including JavaScript, CSS, and integrates multiple analytics and tracking services such as Google Analytics, PostHog, and Gemius. The site is well-optimized for mobile devices and demonstrates good performance and accessibility standards. Security-wise, the site enforces HTTPS and uses some security best practices, though it lacks explicit security headers and publicly available security or incident response policies. The absence of WHOIS data reduces transparency but does not detract significantly from the site's legitimacy given its brand recognition and content richness. Overall, the site is professional, trustworthy, and safe for general audiences.

Scanned

This is an earlier scan of seznam.cz. View the latest report

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

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 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

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics

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

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

Keep watching seznam.cz

This scan found 23 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
85
Security headers
65
Email security
60
DNS health
55
Network security
100
GDPR outside view
10
Average
63

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

Seznam.cz operates as a comprehensive media and internet services company in the Czech Republic, with a large user base and diversified content portfolio. Its competitive advantage lies in its local market dominance and integration of multiple services under one portal. Revenue streams are primarily from advertising and possibly premium services. The target customers are Czech internet users across demographics. The company maintains partnerships with various Czech news outlets and service providers, enhancing its ecosystem. Growth indicators include continuous content updates and service expansions. Strategic observations suggest a focus on maintaining market leadership through content quality and technological enhancements.

Security posture

The website demonstrates a moderate to good security posture with enforced HTTPS and some security headers. However, it lacks comprehensive security policies, incident response contacts, and explicit privacy and cookie policies, which are important for GDPR compliance and user trust. The use of multiple third-party tracking services increases the attack surface and privacy risks. No critical vulnerabilities or exposed sensitive data were detected in the analyzed content. The absence of WHOIS data is a concern for transparency but may be due to registry policies. Overall, the security maturity is adequate but could be improved by publishing security and privacy documentation and enhancing header configurations.

Recommendations

  1. Publish clear and comprehensive privacy and cookie policies with user consent mechanisms to improve GDPR compliance.
  2. Add explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  3. Provide publicly accessible security policy and incident response contact information to improve transparency and user trust.
  4. Review and minimize third-party tracking scripts to reduce privacy risks and improve site performance.
  5. Investigate and resolve the lack of WHOIS data availability to enhance domain registration transparency.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Seznam.cz
Description
Nejnavštěvovanější český internetový portál nabízející vyhledávač, e-mail, aktuální zprávy, předpověď počasí a odkazy, které se mohou hodit.
Key services
Search engine, Email, News, Weather forecast, Links to various services (TV, maps, classifieds, etc.)
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, CSS, HTML5, XMLHttpRequest, PostHog analytics, Google Tag Manager, Gemius tracking
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of crossorigin attributes on resources
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, PostHog, Gemius
Tracking level
extensive
Privacy practices
basic

Advertising

Ad networks
Sklik
Tracking pixels
Gemius, PostHog
Marketing tools
PostHog
Transparency
good

Site quality

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

Key observations

  1. Website is a major Czech internet portal with diverse content and services.
  2. Content is rich, well-structured, and professionally presented.
  3. No WHOIS data available, which is unusual but may be due to CZ domain registry policies or query limitations.
  4. No explicit privacy, cookie, or terms of service pages detected in the main HTML content.
  5. Extensive use of third-party analytics and tracking services.
  6. No security policy or incident response information publicly visible.
  7. No contact emails or phone numbers explicitly found in the main page content.
  8. No signs of adult or NSFW content.
  9. No WAF or blocking mechanisms detected.
Technical notes

Notes

The website uses a modern tech stack with extensive JavaScript and CSS, leveraging CDNs for static content delivery. It integrates multiple analytics and tracking services, including Google Tag Manager, PostHog, and Gemius. The site is mobile-optimized and performs well with fast loading times. Accessibility features such as ARIA labels and keyboard navigation are present. No CMS was explicitly detected, suggesting a custom or proprietary platform. Hosting appears to be via Czech CDN providers. Technical risks include reliance on multiple third-party scripts which may impact privacy and security. Opportunities exist to improve security headers and formalize 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. 63/100Medium30 findingsView report
  2. 63/100Medium29 findingsView report
  3. 63/100Medium30 findingsView report
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