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Security report for klet.org

Klet Observatory · Other · Czech Republic

High risk. 10 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

49/100

Risk levelHigh

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

Kleť Observatory is a well-established scientific research institution based in the Czech Republic, specializing in astronomy and near-earth object observations. Supported by the South Bohemian Region and grants, it operates a research program focused on minor planets and the KLENOT project. The website reflects a professional and consistent brand image, targeting a general audience interested in astronomy and scientific research. The domain age and WHOIS data confirm the legitimacy and long-standing presence of the observatory. Technically, the website uses a straightforward tech stack including jQuery and Lightbox, with responsive design elements and basic SEO optimizations. The cookie consent mechanism is implemented in compliance with GDPR principles, although no explicit privacy policy or terms of service pages were found. Performance is moderate, and mobile optimization is good. From a security perspective, the site uses HTTPS and has a cookie consent banner, but lacks advanced security headers and DNSSEC. No vulnerabilities or exposed sensitive data were detected, but improvements are recommended to enhance security posture. The absence of a published security policy or incident response contacts is noted. Overall, the website is trustworthy and professional, with a moderate security posture and good business credibility. Strategic improvements in security and privacy documentation would enhance compliance and user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 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

10 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 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';…

  2. GDPR outside view

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

    • 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

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

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

Keep watching klet.org

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
52
Security headers
20
Email security
85
DNS health
80
Network security
20
GDPR outside view
35
Average
49

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

Kleť Observatory holds a niche position as a scientific research institution in astronomy within the Czech Republic. Its competitive advantage lies in its long history, regional government support, and specialized research projects like the KLENOT project. The business model is primarily grant and government funded, focusing on research outputs and public engagement. The target customers include scientific communities, students, and astronomy enthusiasts. The observatory maintains partnerships with regional authorities and technology providers. Growth indicators include active research programs and social media engagement. The website supports these operations by providing detailed program information and public relations content.

Security posture

The current security maturity level is moderate. The website employs HTTPS and a cookie consent mechanism, indicating basic compliance with privacy regulations. However, the lack of DNSSEC, security headers, and published security policies suggests gaps in security best practices. No critical vulnerabilities or exposed sensitive data were found, but the absence of incident response contacts and security framework references limits the site's readiness for security incidents. Compliance with GDPR is partial, mainly through cookie consent, but privacy policy absence is a gap. Overall, the security culture appears basic and could benefit from formalization and transparency.

Recommendations

  1. Enable DNSSEC to improve domain security and prevent DNS spoofing.
  2. Implement security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web attacks.
  3. Publish a comprehensive privacy policy and terms of service to enhance transparency and GDPR compliance.
  4. Add a security policy page including incident response contacts to improve security posture and user trust.
  5. Conduct regular security audits and update SSL/TLS configurations to maintain strong encryption standards.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Klet Observatory
Description
The Kleť Observatory is a research institution belonging to few natural science centers of Southern Bohemia in the Czech Republic, supported by the South Bohemian Region. The observatory is situated south of the top of Klet mountain (at altitude of 1070 m), southwest from the town of České Budějovice, where the seat of the directorship and observatory archive are located. Kleť Observatory was founded in 1957.
Key services
NEO observations, Minor planet research, KLENOT Project research, Publications and public relations
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Lightbox.js, Google Fonts, Custom CSS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
55/100
Good practices seen
  • Use of HTTPS (implied by og:url https://www.klet.org)
  • Cookie consent mechanism implemented

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

Advertising

Tracking pixels
toplist.cz, navrcholu.cz
Marketing tools
kostax.cz cookie consent
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is focused on scientific research and public information about the Kleť Observatory.
  3. Cookie consent mechanism is implemented in Czech language with detailed options.
  4. No explicit privacy policy or terms of service pages found.
  5. No direct contact emails or phone numbers visible in the HTML content.
  6. Social media presence on Twitter, Facebook, Instagram is linked.
  7. Technical stack is simple and uses common libraries like jQuery and Lightbox.
  8. No advanced security headers or DNSSEC enabled, room for security improvements.
  9. WHOIS data is consistent and supports the legitimacy of the site.
Technical notes

Notes

The website uses a simple but effective technology stack with jQuery and Lightbox for UI interactions and Google Fonts for typography. The CSS is segmented for mobile, tablet, and desktop, indicating responsive design considerations. Hosting and DNS are managed via Tucows and forpsi.cz name servers, but DNSSEC is not enabled. Performance is moderate with no evident broken elements. SEO is basic with meta tags and Open Graph data present but no advanced structured data like JSON-LD. Accessibility is basic with no ARIA roles or landmarks detected. The site could benefit from modernization and enhanced technical SEO and accessibility features.
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

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