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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 aggregation, weather forecasts, maps, video streaming, and e-commerce listings. It targets Czech internet users with a comprehensive digital ecosystem supported primarily by advertising revenue. The website demonstrates a mature technical infrastructure with modern JavaScript, CSS, and CDN usage, ensuring fast performance and excellent mobile optimization. Security posture is solid with HTTPS enforced and no visible sensitive data exposure, though some security headers and explicit policies are missing. Privacy compliance is basic, lacking clear privacy and cookie policies or consent mechanisms. Overall, the site is highly professional and trustworthy, but improvements in transparency and security policy publication are recommended.

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 holds a dominant market position in the Czech Republic as a comprehensive internet portal. Its business model revolves around advertising and providing diversified online services that cater to broad user needs, from search to lifestyle content. The portal integrates multiple partner sites for news, sports, entertainment, and specialized services, creating a strong ecosystem. Growth indicators include extensive content updates and integration of modern analytics and marketing tools. The company maintains a consistent brand and high content quality, appealing to a large Czech audience. Strategic partnerships with local content providers enhance its market reach and user engagement.

Security posture

The website exhibits a good security maturity level with HTTPS enforced and no apparent exposure of sensitive data. However, the absence of key security headers such as Content-Security-Policy and Strict-Transport-Security reduces the overall security posture. There is no visible security policy or incident response contact information, which is a compliance gap. No vulnerability disclosure or security.txt file was found, limiting transparency for security researchers. The use of multiple third-party analytics and advertising scripts introduces potential privacy risks, though no direct vulnerabilities were detected in the provided content. Enhancing security headers and publishing clear security policies would improve the security culture and compliance.

Recommendations

  1. Implement and publish comprehensive privacy and cookie policies with explicit user consent mechanisms to improve GDPR compliance.
  2. Add security headers such as Content-Security-Policy, X-Content-Type-Options, and Strict-Transport-Security to strengthen security posture.
  3. Publish a security policy and incident response contact information to enhance transparency and readiness.
  4. Introduce a vulnerability disclosure program or security.txt file to facilitate responsible reporting of security issues.
  5. Enhance contact information availability with verified company emails and phone numbers to improve business credibility and user trust.
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
Internet search, Email, News aggregation, Weather forecasts, Maps, Video streaming, E-commerce listings, Dictionary, Job listings
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript ES2017, CSS variables, XHR, IntersectionObserver polyfill, PostHog analytics, Gemius tracking, Google Tag Manager
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of modern JS and CSS
  • Secure form inputs with autocomplete off

Analytics and tracking

Services
PostHog, Gemius, Google Analytics
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. WHOIS data unavailable, possibly due to registry restrictions or privacy
  3. No explicit privacy, cookie, or terms of service pages detected in provided HTML
  4. No direct contact emails or phone numbers found in HTML content
  5. Site uses modern web technologies and is well optimized for mobile
  6. Extensive use of third-party analytics and advertising networks
  7. No security.txt or vulnerability disclosure found
  8. No visible security policy or incident response contacts
  9. Content is rich, diverse, and professionally presented
  10. No WAF or blocking detected, site fully accessible
Technical notes

Notes

The website uses a modern tech stack including ES2017 JavaScript, CSS variables, and multiple polyfills for compatibility. It leverages a CDN (sdn.cz) for static assets, ensuring fast content delivery. The site is mobile-optimized with responsive design and accessibility features such as ARIA labels and keyboard navigation support. SEO is well addressed with proper meta tags, Open Graph tags, and canonical links. The presence of multiple analytics and marketing scripts indicates a mature digital marketing infrastructure. No CMS was explicitly detected. The site shows no signs of technical debt or performance bottlenecks in the analyzed content.
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. 63/100Medium30 findingsView report
  3. 63/100Medium29 findingsView report
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