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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 search engine, email, news, weather, maps, video streaming, and shopping comparison. It holds a dominant market position in the Czech Republic and serves a broad audience with diverse content and utility services. The website is professionally designed with excellent content quality and consistent branding across its multiple affiliated services. Technically, the site employs modern JavaScript frameworks, asynchronous loading, and CDN hosting to ensure fast performance and good mobile optimization. Security posture is strong with HTTPS enforcement and no visible vulnerabilities, though explicit security headers and published security policies are lacking. Privacy compliance is basic, with cookie consent mechanisms present but no clear privacy or terms of service links detected in the analyzed content. WHOIS data is unavailable, likely due to registry policies, which slightly reduces trust but does not detract significantly from the site's legitimacy given its prominence. Overall, Seznam.cz is a mature, professional, and trustworthy media portal with extensive content and services tailored to Czech users.

Scanned

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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Recommended

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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 an advertising-supported internet portal with a diversified portfolio of services including news, search, email, video, and e-commerce related offerings. Its market leadership in the Czech Republic is supported by strong brand recognition and a broad ecosystem of affiliated domains and services. The business model leverages content aggregation and user engagement to drive advertising revenue. The portal targets general Czech internet users seeking comprehensive online services. Partnerships with multiple news and entertainment sites enhance content diversity and user retention. The company demonstrates strong digital maturity with modern infrastructure and analytics integration. Growth indicators include extensive service offerings and integration of trending topics and multimedia content. Strategic observations highlight the importance of improving privacy transparency and security policy publication to align with evolving compliance standards.

Security posture

The website exhibits a solid security posture with enforced HTTPS and use of crossorigin attributes to secure resource loading. No exposed sensitive data or vulnerable libraries were detected in the analyzed HTML content. The site uses deferred and asynchronous script loading to optimize performance and reduce attack surface. However, the absence of explicit security headers such as Content-Security-Policy and X-Frame-Options is a gap that should be addressed to mitigate risks like clickjacking and cross-site scripting. No incident response or security contact information is published, which limits transparency and readiness perception. Privacy compliance is basic, with cookie consent mechanisms but no clear privacy or terms of service documentation found. Overall, the security maturity is good but can be improved by adopting comprehensive security headers and publishing security policies.

Recommendations

  1. Implement and publish a comprehensive privacy policy and terms of service accessible from the homepage.
  2. Add explicit security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  3. Publish incident response and security contact information to improve transparency and trust.
  4. Enhance GDPR compliance by clearly communicating data collection, retention, and user rights.
  5. Regularly audit third-party scripts and tracking services to minimize privacy risks and improve performance.

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, Maps, Video streaming, Dictionary, Shopping comparison, Job listings
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript ES2017, XMLHttpRequest, IntersectionObserver polyfill, PostHog analytics, Google Tag Manager, Gemius tracking, JHMT API, Custom CSS variables
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
  • Use of deferred and async script loading

Analytics and tracking

Services
PostHog, Google Analytics, 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 extensive content and services
  2. Content is rich, well-structured, and professionally presented
  3. No WHOIS data available, possibly due to registry restrictions
  4. No explicit privacy or terms of service links found in the analyzed HTML snippet
  5. Cookie consent mechanism appears implemented via scripts
  6. Multiple external domains linked, mostly owned or affiliated services
  7. Use of modern JavaScript and CSS techniques
  8. HTTPS is enforced with good security practices
  9. Extensive use of tracking and analytics services
  10. No signs of adult or NSFW content
Technical notes

Notes

The website uses a modern technology stack with ES2017 JavaScript, asynchronous and deferred script loading, and CDN-hosted static assets to ensure fast loading times and good performance. The use of CSS variables and responsive design techniques supports excellent mobile optimization and accessibility. Analytics and tracking are implemented via PostHog, Google Analytics, and Gemius, indicating extensive user behavior monitoring. The site lacks a detected CMS, suggesting a custom or proprietary platform. Hosting appears to be via Czech CDN providers, enhancing regional performance. Technical risks include reliance on multiple third-party tracking services and absence of some security headers. Opportunities exist to improve privacy transparency and security posture through technical and policy enhancements.
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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