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Security report for chmi.cz

Český hydrometeorologický ústav · Government · Czech Republic

Medium risk. 6 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

65/100

Risk levelMedium

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

Český hydrometeorologický ústav (ČHMÚ) is the official Czech government agency responsible for meteorological, hydrological, and air quality monitoring and forecasting. The website serves as a comprehensive portal providing weather forecasts, current environmental situation updates, historical data, and public services including warnings and educational content. It targets a broad audience including the general public, government bodies, media, and business partners. The site is well-branded, consistent, and supported by official certifications such as ISO 9001, reinforcing its authoritative position in the Czech Republic. Technically, the site uses standard web technologies like jQuery and JavaScript, with moderate performance and basic mobile optimization. Privacy and cookie policies are clearly implemented with consent mechanisms, reflecting good compliance with GDPR standards. Security posture is adequate with no critical vulnerabilities detected, though improvements in HTTP security headers and mobile accessibility are recommended. Overall, the site is trustworthy, professional, and fulfills its role as a government information portal effectively.

Scanned

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

NIS2 and GDPR posture

GDPR outside view
40/ 100 · High
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

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, LinkedIn, YouTube

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

  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 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 chmi.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.

Daily monitoring

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
67
Security headers
30
Email security
75
DNS health
80
Network security
100
GDPR outside view
40
Average
65

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

The ČHMÚ operates as a government entity providing essential environmental data and forecasts. Its market position is strong as the national authoritative source for meteorological and hydrological information. The business model is service-oriented, focusing on public safety, environmental monitoring, and data dissemination. Revenue streams are likely government-funded, with additional services for media and partners. The partnership ecosystem includes national and international organizations such as the Ministry of Environment, WMO, and EUMETSAT. The website's extensive content and multiple service offerings indicate a mature operation with a large user base. Strategic observations include the importance of maintaining data accuracy, expanding digital services, and enhancing user engagement through mobile and interactive platforms.

Security posture

The website demonstrates a moderate to good security maturity level. HTTPS is implied and likely enforced, though explicit security headers are not detected in the provided data. The presence of cookie consent and privacy policies indicates awareness of data protection regulations. No exposed sensitive data or vulnerable libraries were found in the HTML content. The site uses third-party analytics and marketing tools responsibly with user consent. Incident response and vulnerability disclosure mechanisms are not explicitly found, suggesting an area for improvement. Overall, the security posture supports the site's role as a trusted government portal but would benefit from enhanced security headers, formal incident response contacts, and regular security audits.

Recommendations

  1. Implement comprehensive HTTP security headers including Content Security Policy, HSTS, X-Frame-Options, and X-Content-Type-Options.
  2. Enhance mobile optimization and accessibility to improve user experience on diverse devices.
  3. Establish and publish clear incident response and vulnerability disclosure policies to improve transparency and security readiness.
  4. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.
  5. Increase visibility of data protection officer contact and security policies to strengthen user trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Český hydrometeorologický ústav
Description
Český hydrometeorologický ústav provides meteorological, hydrological, and air quality forecasts and data for the Czech Republic. It offers weather predictions, current situation updates, historical data, and various public services including warnings and educational content.
Key services
Weather forecasts, Hydrological forecasts, Air quality monitoring, Warnings and alerts, Data archives, Mobile applications, Public education and media services
Content quality
good
Branding
consistent

Technology

Stack
jQuery, jQuery UI, JavaScript, CSS, HTML5
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • Cookie consent with granular control
  • No exposed sensitive data in HTML
  • Use of HTTPS (implied by domain and scripts)

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Marketing tools
Google Ads
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and no blocking detected.
  2. WHOIS data is unavailable or protected, common for CZ domains.
  3. Strong presence of official and partner links indicating legitimacy.
  4. Comprehensive privacy and cookie policies with consent mechanisms.
  5. Use of Google Analytics and Google Ads with proper consent.
  6. No forms detected on homepage; no direct data collection visible.
  7. Social media presence on major platforms with official accounts.
  8. ISO 9001 certification mentioned indicating quality management.
  9. Content is in Czech with English language option available.
  10. Website provides extensive meteorological, hydrological, and air quality information.
Technical notes

Notes

The website is built on a traditional web stack using HTML, CSS, JavaScript, and jQuery libraries. It employs client-side scripting for dynamic content loading and user interaction. The site includes multiple CSS stylesheets for layout and theming, and uses JavaScript for cookie consent management and map/tab switching functionalities. Performance is moderate with room for improvement in mobile responsiveness and accessibility. No modern CMS or framework is explicitly detected, suggesting a custom or legacy platform. Hosting provider details are not available from the content. The site integrates external services such as Google Analytics and Google Tag Manager for tracking and marketing. Technical risks include potential outdated libraries and lack of advanced security headers.
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. 65/100Medium31 findingsView report
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