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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

The Český hydrometeorologický ústav (ČHMÚ) is the Czech Republic's national meteorological and environmental authority, providing comprehensive weather forecasts, hydrological data, and air quality monitoring. The website serves a broad audience including the general public, government bodies, media, and business partners, offering detailed environmental data, news, and specialized services such as mobile applications. The organization holds ISO 9001 certification, reinforcing its credibility and commitment to quality. Technically, the website employs traditional web technologies including jQuery and JavaScript, with a moderate performance profile and basic mobile optimization. The site implements a robust cookie consent mechanism aligned with GDPR requirements, denying marketing and analytics cookies by default. While HTTPS is used, explicit security headers are not detected in the provided data, suggesting room for improvement in security hardening. Security posture is solid with no visible vulnerabilities or exposed sensitive data, but the absence of detailed incident response contacts and security headers indicates potential gaps. Privacy compliance is strong, supported by comprehensive privacy and cookie policies. The domain WHOIS data is unavailable due to CZ.NIC policies, but the domain usage and content strongly indicate legitimacy as a government entity. Overall, the website is professional, trustworthy, and content-rich, with recommendations to enhance security headers, mobile responsiveness, and incident response transparency to further strengthen its security and user trust.

Scanned

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.

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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
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

ČHMÚ occupies a critical position as the Czech Republic's official meteorological and environmental institute, operating under government mandate. Its business model centers on public service delivery, providing authoritative environmental data and forecasts. The institute leverages partnerships with international organizations such as WMO, EEA, and EUMETSAT, enhancing its data quality and reach. Revenue streams are likely government-funded, with additional services offered to media, local authorities, and commercial partners. The website's extensive content and multiple communication channels reflect a mature digital presence, supporting transparency and stakeholder engagement. Strategic growth may focus on expanding digital services and mobile applications to increase accessibility and user engagement.

Security posture

The website demonstrates a moderate to strong security posture with HTTPS enforced and a comprehensive cookie consent mechanism that defaults to denying marketing and analytics cookies, aligning with GDPR. No exposed sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of explicit security headers such as Content Security Policy (CSP), X-Frame-Options, or HSTS suggests potential areas for enhancement. Incident response information is not publicly available, which could hinder rapid mitigation of security incidents. Overall, the security culture appears mature but would benefit from formalizing incident response contacts and implementing additional HTTP security headers to mitigate common web threats.

Recommendations

  1. Implement HTTP security headers including CSP, HSTS, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  2. Publish clear incident response contact information and procedures to improve security incident management and transparency.
  3. Improve mobile optimization to provide a better user experience across devices.
  4. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.
  5. Enhance accessibility features to comply with international standards and improve usability for all users.
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 serves as a national authority for weather, climate, and environmental monitoring.
Key services
Weather forecasts, Hydrological forecasts, Air quality monitoring, Historical environmental data, Public information and media services, Mobile applications
Content quality
excellent
Branding
consistent

Technology

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

Security

Observed score
75/100
Good practices seen
  • Cookie consent with default denied for marketing and analytics
  • Use of HTTPS (implied by domain and scripts loaded via https)
  • No exposed sensitive data in HTML

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
excellent
Navigation
good
Professionalism
good
Trustworthiness
high

Key observations

  1. Website is a government portal for the Czech Hydrometeorological Institute.
  2. Content is comprehensive and professionally presented in Czech language.
  3. No WHOIS data available publicly due to CZ.NIC policies.
  4. Cookie consent mechanism is implemented with default denial for marketing and analytics.
  5. Multiple social media channels are linked and active.
  6. No security headers detected in provided data; recommend audit.
  7. No forms collecting personal data detected on homepage; contact forms likely on contact pages.
  8. Website uses legacy JavaScript libraries like jQuery but is functional.
  9. No signs of malware, phishing, or suspicious content.
  10. Website provides extensive environmental data and news updates.
Technical notes

Notes

The website uses a traditional web technology stack with jQuery and JavaScript for dynamic content and UI interactions. CSS is used extensively for styling, with multiple stylesheets for layout, print, and calendar components. The site loads external scripts asynchronously from Google Tag Manager and uses custom scripts for cookie consent and map interactions. The performance is moderate, with room for improvement in mobile responsiveness and modernizing the tech stack. No CMS or hosting provider information is explicitly detected. The site structure is clear with well-organized navigation and content sections, supporting good SEO and accessibility 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. 65/100Medium31 findingsView report
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