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Security report for cz-mesta.eu

as4u.cz, s.r.o. · Other · Czech Republic

Medium risk. 7 critical or high findings in GDPR outside view, Email security and 2 other checks.

Security score

65/100

Risk levelMedium

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

The website www.cz-mesta.eu serves as an online encyclopedia dedicated to nearly 1400 towns and settlements in the Czech Republic, focusing on their urbanistic and historical development. It is a niche cultural and historical resource published in collaboration with the Sdružení historických sídel Čech, Moravy a Slezska and managed by as4u.cz, s.r.o. The site offers rich content including maps, photographs, and detailed descriptions, targeting general audiences interested in Czech urban history. The business model is informational, providing free access under a Creative Commons license, positioning itself as a trusted cultural reference within its domain. Technically, the site uses a custom CMS named Public4u, with frontend technologies including jQuery, jQuery UI, Leaflet.js for maps, and Swiper.js for sliders. The site is moderately performant, mobile-optimized, and SEO-friendly, though accessibility features are basic. No advanced analytics or tracking scripts were detected, indicating a privacy-conscious approach. However, the site lacks explicit privacy and cookie policies, which is a compliance gap. From a security perspective, the site uses HTTPS but does not expose security headers or incident response information. No vulnerabilities or sensitive data exposures were found in the content. The domain WHOIS data is privacy protected as per EURid policy, which is reasonable for this type of informational site. Overall, the security posture is moderate but could be improved by adding security headers, privacy notices, and vulnerability disclosure mechanisms. The overall risk assessment is low, with the main recommendations focusing on enhancing privacy compliance and security best practices to improve trust and regulatory adherence. The site is professionally designed and trustworthy for its intended audience, with no signs of malicious or adult content.

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

7 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. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  3. 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';…

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

Keep watching cz-mesta.eu

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
72
Security headers
40
Email security
60
DNS health
75
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 website operates in the cultural and historical informational sector, providing a specialized encyclopedia on Czech towns. Its market positioning is niche, targeting historians, urban planners, educators, and the general public interested in Czech urban development. The business model is non-commercial, relying on collaboration with historical associations and licensing content under Creative Commons. Revenue streams are not evident, suggesting a focus on public service or academic dissemination. The partnership ecosystem includes Sdružení historických sídel Čech, Moravy a Slezska and the CMS provider as4u.cz, s.r.o. Growth indicators include updated content for 2025 and a structured, searchable platform. The company behind the site is small, with no subsidiaries or parent companies identified. Competitive advantages include authoritative content, rich illustrations, and a well-organized digital platform.

Security posture

The website demonstrates a moderate security maturity level. HTTPS is implemented, ensuring encrypted communications. However, the absence of security headers such as Content Security Policy, HSTS, and X-Frame-Options reduces protection against common web attacks. No incident response or vulnerability disclosure information is provided, limiting transparency and readiness for security events. Data protection practices are minimal, with no visible privacy or cookie policies, which may expose the site to GDPR compliance risks. No tracking or analytics scripts reduce privacy concerns but also limit user behavior insights. Overall, the security culture appears basic, with room for improvement in compliance and proactive security measures.

Recommendations

  1. Implement comprehensive privacy and cookie policies with explicit user consent mechanisms to ensure GDPR compliance.
  2. Add standard security headers (CSP, HSTS, X-Frame-Options, X-Content-Type-Options) to enhance protection against web vulnerabilities.
  3. Publish a security.txt file or a vulnerability disclosure page to improve incident response transparency and encourage responsible reporting.
  4. Enhance accessibility features to meet WCAG standards, improving usability for all users.
  5. Consider integrating minimal analytics with privacy-respecting configurations to better understand user engagement while maintaining compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
as4u.cz, s.r.o.
Description
Encyklopedie všech téměř 1400 sídel na území České republiky, která mají nebo v minulosti měla status města či městyse (městečka), včetně těch, která již neexistují. Popis urbanistického vývoje městských sídel v krajinných, historických, hospodářských a demografických souvislostech. Doplněna ilustracemi – mapami, vedutami a fotografiemi. Internetová verze publikována ve spolupráci se Sdružením historických sídel Čech, Moravy a Slezska od roku 2025. Obsah lze využívat dle licence Creative Commons CC BY-NC-SA 4.0.
Key services
Urbanistic and historical encyclopedia content, Searchable database of Czech towns and settlements, Illustrations and maps, Online access to updated encyclopedia
Content quality
good
Branding
consistent

Technology

Stack
jQuery, jQuery UI, Leaflet.js, Swiper.js
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
60/100
Good practices seen
  • HTTPS usage implied by URLs
  • No exposed sensitive data in HTML

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. WHOIS data is unavailable due to EURid privacy policy for .eu domains.
  3. Website uses a custom CMS named Public4u.
  4. No explicit privacy or cookie policies found, which is a compliance gap.
  5. Contact email is present in meta tags but no visible contact page or phone numbers.
  6. No security.txt or incident response information found.
  7. No analytics or tracking scripts detected, indicating minimal user tracking.
  8. Content is focused on Czech towns and urban development history, suitable for general audiences.
  9. No advertising or marketing tools detected.
  10. Site is mobile optimized with responsive design and accessible navigation.
Technical notes

Notes

The website is built on a custom CMS named Public4u, utilizing frontend libraries such as jQuery, jQuery UI, Leaflet.js for interactive maps, and Swiper.js for image sliders. The HTML structure is valid and includes appropriate meta tags for SEO and social sharing (Open Graph). The site is mobile-optimized with responsive CSS and a mobile menu. Performance is moderate, with multiple external scripts but no heavy frameworks detected. No modern frontend frameworks (React, Angular, Vue) are used, indicating a traditional web architecture. Hosting provider details are not disclosed. The site lacks advanced accessibility features but maintains basic usability. There is no evidence of technical debt or deprecated libraries, but security headers and privacy compliance features are missing, representing modernization opportunities.
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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