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Security report for centrum.cz

Centrum.cz · Media · Czech Republic

Medium risk. 8 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

60/100

Risk levelMedium

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

Centrum.cz is a prominent Czech internet portal providing a variety of services including email, news, weather updates, and other online content. The website targets the Czech-speaking audience and maintains a professional and consistent brand presence. Technically, the site is built using modern web technologies such as React and Next.js, leveraging CDN services for content delivery and performance optimization. The site integrates multiple third-party advertising and analytics services, including Google Tag Manager, Gemius, and Performax, indicating a mature digital marketing infrastructure. Security-wise, the site employs HTTPS and some security best practices, though explicit security headers and privacy policies are not clearly present in the provided content. The absence of WHOIS data is typical for Czech domains managed by CZ.NIC but limits external verification of domain ownership and age. Overall, the site is accessible, well-structured, and serves a large user base with general audience content.

Scanned

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

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
Checks completed
6of 7

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

8 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

  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 Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • 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';…

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Keep watching centrum.cz

This scan found 24 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
65
Security headers
15
Email security
75
DNS health
80
Network security
100
GDPR outside view
25
Average
60

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

Centrum.cz holds a strong market position as a leading Czech internet portal, offering essential online services such as email and news aggregation. Its business model relies heavily on advertising revenue, supported by integration with multiple ad networks and tracking platforms. The portal caters to a broad demographic within the Czech Republic, providing localized content and services. The consistent branding and quality content suggest a well-established operation with significant user engagement. While no explicit parent company or subsidiaries were identified, the portal's scale and service diversity indicate a large organizational structure. The lack of publicly available WHOIS data is consistent with local domain registration policies but warrants cautious trust evaluation.

Security posture

The website demonstrates a good security posture with mandatory HTTPS usage and integration of privacy-related SDKs. However, the absence of explicit security headers such as Content-Security-Policy and X-Frame-Options reduces the overall security robustness. No vulnerabilities or exposed sensitive data were detected in the analyzed content. The site lacks visible incident response or security contact information, which is a gap in security transparency. The use of multiple third-party scripts necessitates ongoing security audits to mitigate risks from external dependencies. Privacy compliance is limited by the absence of clear cookie consent mechanisms and privacy policies, which could expose the portal to regulatory scrutiny under GDPR.

Recommendations

  1. Implement and publicly display comprehensive privacy and cookie policies with explicit GDPR compliance.
  2. Add and enforce security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Provide clear security incident response contact information to enhance transparency and trust.
  4. Regularly audit third-party scripts and ad networks for security vulnerabilities and privacy compliance.
  5. Consider publishing WHOIS or domain ownership information where possible to improve trustworthiness.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Centrum.cz
Description
Centrum.cz is a Czech internet portal offering email, current news, weather, and other interesting services.
Key services
email service, news portal, weather updates, search engine
Content quality
good
Branding
consistent

Technology

Stack
React (Next.js framework), Google Tag Manager, Google Analytics, Facebook SDK, YouTube Widget API, Gemius (analytics), Performax (ad tech), CPEX (ad tech), Snowly (ad tech), Privacy Center SDK
Frameworks
Next.js, React
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • Use of HTTPS
  • Use of third-party security and privacy SDKs
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Gemius
Tracking level
extensive
Privacy practices
basic

Advertising

Ad networks
Gemius, Performax, CPEX, Snowly
Tracking pixels
Gemius, Facebook SDK
Marketing tools
Google Custom Search, Performax ad scripts
Transparency
basic

Site quality

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

Key observations

  1. Website is a major Czech internet portal offering email, news, weather, and other services.
  2. Content is in Czech language and targets Czech users.
  3. No WHOIS data available due to CZ.NIC policy or domain status.
  4. No privacy or cookie policies explicitly found in the provided HTML content.
  5. Multiple third-party ad and tracking scripts are used.
  6. No security or incident response contact information found.
  7. No forms detected in the provided HTML snippet.
  8. Website uses modern React/Next.js framework and CDN for performance.
  9. No adult or explicit content detected.
  10. No WAF or blocking mechanisms detected; content fully accessible.
Technical notes

Notes

The website is built on a modern React/Next.js framework, utilizing a CDN (hpx-cdn.xsd.cz) for static asset delivery, which supports good performance and scalability. The integration of Google Tag Manager, Facebook SDK, YouTube API, and multiple ad tech providers indicates a complex but mature technical ecosystem. SEO is supported by proper meta tags and structured data, although no JSON-LD or Open Graph tags were explicitly found in the provided content. Mobile optimization appears good, with responsive design elements. Accessibility features are basic but present. The site could benefit from enhanced security headers and improved privacy mechanisms to align with best practices.
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. 60/100Medium32 findingsView report
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