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Security report for slunecno.cz

Evaluate Dynamics s.r.o. · Media · Czech Republic

Medium risk. 4 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

74/100

Risk levelMedium

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

Evaluate Dynamics s.r.o. operates the website Slunecno.cz, a well-established meteorological service providing detailed weather forecasts and meteorological data primarily for the Czech Republic but also globally. The site offers hourly, daily, and long-term weather predictions, meteorological news, radar and satellite imagery, and weather widgets for integration into other websites. It targets a broad audience interested in weather information, including general public users and webmasters seeking weather widgets. The business model appears to be based on free access supported by advertising and newsletter subscriptions. Technically, the website employs modern web technologies including Google Analytics 4, Google Tag Manager, Google Adsense, and Cloudflare services for performance and security. The site is mobile-optimized with good SEO practices and a moderate performance profile. Accessibility is basic but functional. Privacy and cookie policies are present with GDPR compliance mechanisms, including consent management and IP anonymization. From a security perspective, the site uses HTTPS with strong SSL configuration and privacy-conscious analytics settings. However, it lacks explicit security headers and published security policies or incident response information. No vulnerabilities or exposed sensitive data were detected in the content. The absence of WHOIS data limits domain registration transparency, but the website content and business information indicate a legitimate and professional operation. Overall, Slunecno.cz presents a trustworthy and professional weather information service with good technical and privacy practices. Strategic improvements could include enhancing security headers, publishing a security policy, and adding a vulnerability disclosure mechanism to further strengthen trust and security posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
85/ 100 · Low
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

4 findings rated critical or high. Fix these first.

  1. 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 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';…

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • 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

  3. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

Need hands-on remediation? Email guard@offseq.com

Keep watching slunecno.cz

This scan found 18 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
75
Security headers
40
Email security
55
DNS health
90
Network security
100
GDPR outside view
85
Average
74

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

Slunecno.cz holds a strong position in the Czech meteorological information market, operating since 2010 with a focus on providing comprehensive weather forecasts and meteorological news. Its competitive advantage lies in the breadth of locations covered (over 150,000), detailed hourly and long-term forecasts, and integration options via widgets and newsletters. Revenue streams likely include advertising and possibly premium newsletter subscriptions. The target customer segments include general public users, weather enthusiasts, and webmasters. The company maintains partnerships with advertising networks and social media platforms to enhance reach. Growth indicators include continuous content updates, active news sections, and integration of modern analytics and advertising technologies. The business ecosystem includes related domains for advertising and social media but no detected subsidiaries or parent companies.

Security posture

The website demonstrates a mature security posture with mandatory HTTPS, privacy-conscious analytics configurations, and cookie consent mechanisms aligned with GDPR. Key strengths include encrypted communications, IP anonymization, and transparent privacy policies. However, the absence of security headers such as Content-Security-Policy and lack of published security or incident response policies represent gaps. No security.txt or vulnerability disclosure policy is present, limiting external reporting channels. The site shows no signs of malware or phishing. Overall, the security maturity is good but could be enhanced by adopting additional security best practices and formalizing incident response and vulnerability disclosure processes.

Recommendations

  1. Implement HTTP security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web attacks.
  2. Publish a formal security policy and incident response plan accessible to users and stakeholders.
  3. Create and maintain a security.txt file to facilitate responsible vulnerability disclosure.
  4. Regularly audit and update third-party scripts and dependencies to prevent vulnerabilities.
  5. Enhance accessibility features to improve compliance and user experience for all users.

Contact details published on the site

Addresses
Legal name
Evaluate Dynamics s.r.o.
Registration number
29286042
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Evaluate Dynamics s.r.o.
Description
Provides meteorological data and weather forecasts for Czech Republic and worldwide, including hourly, daily, and long-term forecasts up to 30 days. Offers weather news, radar maps, satellite images, and weather widgets for websites.
Key services
Weather forecasts for 150,000+ locations, Hourly and long-term weather predictions, Meteorological news and articles, Weather radar and satellite maps, Weather widgets and newsletter
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Google Analytics 4, Google Adsense, Cloudflare Zaraz, jQuery
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • IP anonymization in analytics
  • Consent management for cookies and tracking
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics 4, Google Tag Manager
Tracking level
minimal
Privacy practices
good

Advertising

Ad networks
Google Adsense
Tracking pixels
Google Analytics 4, Cloudflare Zaraz
Transparency
good

Site quality

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

Key observations

  1. Website provides comprehensive weather forecasts and meteorological information for Czech Republic and worldwide.
  2. Content is in Czech language with good localization and regional focus.
  3. Multiple forms for search and newsletter subscription collecting minimal personal data.
  4. Use of Google services for analytics and advertising with privacy-conscious settings.
  5. No signs of malware, phishing, or suspicious content.
  6. WHOIS data unavailable, limiting domain registration transparency.
  7. Website includes privacy, cookie, and terms policies with GDPR compliance indications.
  8. No explicit security policy or incident response information found.
  9. No security.txt or vulnerability disclosure policy detected.
  10. Website uses Cloudflare services but no blocking or WAF challenge detected.
Technical notes

Notes

The website is built using standard web technologies including JavaScript, jQuery, and integrates Google services such as Analytics 4, Tag Manager, and Adsense for tracking and monetization. Cloudflare services are used for CDN and security enhancements. The site is mobile-optimized with responsive design and includes SEO-friendly meta tags and Open Graph metadata. Performance is moderate, with potential improvements in loading speed by optimizing third-party scripts. No CMS was detected, suggesting a custom or static site architecture. Accessibility is basic, and there is room for improvement in semantic markup and ARIA attributes. Overall, the technical infrastructure is solid but could benefit from modernization and enhanced security configurations.
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. 73/100Medium27 findingsView report
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