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Security report for umweltbildungszentrum-flensburg.de

Umweltbildungszentrum Flensburg · Education · Germany

High risk. 8 critical or high findings in GDPR outside view, Network security and 2 other checks.

Security score

46/100

Risk levelHigh

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

The Umweltbildungszentrum Flensburg is a small, non-profit educational institution affiliated with the Naturwissenschaftliches Museum Flensburg, focusing on environmental education and sustainability programs. Founded in 2014, it serves local schools, kindergartens, and the general public with a variety of educational offerings including excursions, workshops, and exhibitions. The website reflects a professional and consistent brand presence with clear contact information and official city sponsorship. Technically, the website is built on the Contao Open Source CMS platform, utilizing modern JavaScript libraries such as jQuery and Colorbox for UI enhancements. The site is mobile-optimized and provides a good user experience with clear navigation and relevant content. However, there is room for improvement in security headers and explicit security policy documentation. From a security perspective, the site uses HTTPS and implements a cookie consent banner, indicating awareness of privacy compliance. No critical vulnerabilities or security issues were detected in the content or scripts. The WHOIS data aligns well with the website's claims, showing a consistent and legitimate registration. No WAF or blocking mechanisms interfere with content accessibility. Overall, the website presents a trustworthy and professional digital presence for an educational institution, with moderate technical sophistication and good privacy practices. Strategic improvements in security headers and formal security policies could further enhance its posture.

Scanned

NIS2 and GDPR posture

GDPR outside view
28/ 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

8 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 Cookie Policy found

      GDPR requires clear information about cookie usage

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

  2. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • Critical

      Critical Service Exposed: MySQL

      Port 3306 (MySQL) is publicly accessible - MySQL - Database server

      What to do: Immediately restrict access to MySQL using firewall or VPN

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

  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 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 umweltbildungszentrum-flensburg.de

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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
62
Security headers
55
Email security
70
DNS health
60
Network security
0
GDPR outside view
28
Average
46

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 · found on this site
  • 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 Umweltbildungszentrum Flensburg operates as an important entity within the education and non-profit sectors, delivering environmental education primarily to local schools, kindergartens, and adult learners. Its affiliation with the Naturwissenschaftliches Museum Flensburg and sponsorship by the city of Flensburg provide strong institutional backing. The business model centers on educational programming and community engagement rather than commercial revenue. The website's content and structure support its mission effectively, with clear communication of services and events. The lack of advertising and minimal tracking aligns with its non-profit status and target audience. Growth potential lies in expanding digital outreach and partnerships within the sustainability education ecosystem.

Security posture

The website demonstrates a moderate security maturity level with HTTPS enabled and a cookie consent mechanism in place, supporting GDPR compliance. However, the absence of explicit security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options represents a gap in best practices. No incident response or security policy documentation is publicly available, which could limit preparedness for security events. The use of well-known libraries reduces risk, but ongoing vulnerability management is recommended. Overall, the security posture is adequate for a small educational institution but could benefit from formalized policies and enhanced technical controls.

Recommendations

  1. Implement comprehensive security headers including CSP, HSTS, and X-Frame-Options to strengthen defense against common web attacks.
  2. Publish a clear security policy and incident response plan accessible to users and stakeholders.
  3. Regularly audit and update third-party libraries to mitigate vulnerabilities.
  4. Enhance accessibility features to improve inclusivity and compliance with standards.
  5. Consider adding a terms of service page to clarify user rights and responsibilities.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Umweltbildungszentrum Flensburg
Description
Das Umweltbildungszentrum Flensburg gehört zum Naturwissenschaftlichen Museum Flensburg mit dem Eiszeit-Haus und wurde 2014 gegründet. Es bietet umweltpädagogische Aktivitäten und Angebote, darunter Veranstaltungen zum Umwelt- und Naturschutz sowie Bildung für Nachhaltige Entwicklung (BNE).
Key services
Exkursionen für Schulkassen und Erwachsene, Ferienprogramme, Info- und Spielstationen auf Festen, Themen-Ausleihkisten, Programme für Kitas und Schulen, Ausstellungen, Praktika und Kooperationen, Beratung und Weiterbildungskurse, Tagungen und Ideenbörsen, Entwicklung pädagogischer Formate
Content quality
good
Branding
consistent

Technology

Stack
jQuery 3.6.0, Colorbox (lightbox plugin), object-fit polyfill
Frameworks
Contao Open Source CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • Use of HTTPS (implied by base href https://)
  • Cookie consent banner implemented

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Transparency
poor

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 environmental education and sustainability.
  3. Clear contact information and official affiliations are provided.
  4. No signs of advertising or tracking beyond cookie consent.
  5. Technical implementation uses a known CMS and standard libraries.
  6. No security headers detected; opportunity for improvement.
  7. No terms of service page found.
  8. Cookie consent mechanism is implemented and visible.
Technical notes

Notes

The website is built on the Contao CMS platform, leveraging jQuery 3.6.0 and Colorbox for interactive elements. The codebase appears clean with proper meta tags and responsive design, ensuring good SEO and mobile usability. Performance is moderate, with no evident blocking scripts or heavy resources. The cookie consent implementation is modern and user-friendly. However, the lack of visible security headers and limited analytics/tracking tools suggest a minimalistic technical footprint. Hosting details are not explicit, but multiple DNS servers indicate stable infrastructure. Opportunities exist to modernize security configurations and enhance accessibility compliance.
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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