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Security report for katharineum.de

Katharineum zu Lübeck · Education · Germany

Medium risk. 6 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

53/100

Risk levelMedium

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

Katharineum zu Lübeck is a historic public gymnasium in Germany, founded in 1531, offering a broad educational program including classical languages and extracurricular activities. The website serves as an official informational portal for students, parents, and staff, providing schedules, news, and organizational details. Technically, the site is built on WordPress with a modern plugin ecosystem including Yoast SEO and Matomo analytics, indicating a moderate level of digital maturity. Security posture is adequate with HTTPS enabled but lacks some security headers and explicit privacy and cookie policies, which are important for GDPR compliance. Overall, the site is professional and trustworthy but could improve privacy transparency and security hardening.

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

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 Cookie Policy found

      GDPR requires clear information about cookie usage

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

    • 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

  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 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';…

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Keep watching katharineum.de

This scan found 25 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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  • 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
30
Email security
85
DNS health
75
Network security
40
GDPR outside view
28
Average
53

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention katharineum.de, from OffSeq Breach.

Total records
39
Employees
0
Customers
29
Third parties
10
Weak passwords
33%

6 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for katharineum.de.

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Breach keeps ingesting new leaks, so these numbers can grow between scans.

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Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

The school holds a strong market position as a long-established educational institution with a classical focus. Its business model is public education, targeting students and families in Lübeck and surrounding areas. The website supports this by providing comprehensive information and resources. The presence of a webshop partner for school clothing indicates some commercial activity supporting school branding. The school leverages a mature WordPress ecosystem for content delivery and user engagement. Growth indicators include active news updates and event coverage. Partnerships include the webshop and webmail services. The school's operations appear stable and community-focused.

Security posture

The website uses HTTPS, which is mandatory and well-implemented. However, the absence of key security headers such as Content Security Policy, HSTS, and X-Frame-Options reduces the overall security posture. No exposed sensitive data or vulnerable libraries were detected in the HTML content. The use of security-related plugins like Download Manager with password verification suggests some security awareness. There is no published incident response or vulnerability disclosure information, which is a gap in security maturity. Privacy compliance is weak due to missing privacy and cookie policies. Overall, the security posture is moderate but can be improved with standard best practices.

Recommendations

  1. Implement and publish a comprehensive privacy policy and cookie policy with explicit consent mechanisms to improve GDPR compliance.
  2. Add standard security headers (CSP, HSTS, X-Frame-Options, X-XSS-Protection) to enhance protection against common web attacks.
  3. Publish incident response and vulnerability disclosure information to improve transparency and trust.
  4. Regularly audit and update WordPress plugins and themes to mitigate vulnerabilities.
  5. Enhance accessibility features to improve usability for all users and comply with standards.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Katharineum zu Lübeck
Description
Das Katharineum zu Lübeck ist ein städtisches Gymnasium mit altsprachlichem Zweig, gegründet 1531, das aktuelle Termine, Artikel, Fotos, Leitbild, Unterrichtszeiten, Jahrgangsstufen, Fächer, Fremdsprachen, Ganztag, Mensa, außerunterrichtliche Aktivitäten, Arbeitsgemeinschaften, Schulleitung, Lehrerkollegium, Schulelternbeirat, Schülervertretung, Sekretariat, Hausmeister, Beratungsteam und Förderer vorstellt. Die Schule befindet sich in einem ehemaligen Klostergebäude mit moderner Ausstattung und Medienkonzept.
Key services
Schulbildung Gymnasium, Altsprachlicher Zweig, Ganztagsbetreuung, Arbeitsgemeinschaften, Beratung und Sozialarbeit
Content quality
good
Branding
consistent

Technology

Stack
WordPress, PHP, jQuery, Yoast SEO, WPBakery Page Builder, LayerSlider, Matomo Analytics, Presto Player, Download Manager, Smart Grid Gallery, TeamPress
Frameworks
WordPress
Platforms
WordPress CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enabled
  • No exposed sensitive data in HTML
  • Use of security plugins implied (e.g. download manager with password verification)

Analytics and tracking

Services
Matomo
Tracking level
moderate
Privacy practices
poor

Advertising

Tracking pixels
Matomo
Marketing tools
Yoast SEO
Transparency
basic

Site quality

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

Key observations

  1. Website is an official school site for Katharineum zu Lübeck, a historic gymnasium.
  2. Content is rich with educational and organizational information.
  3. No privacy or cookie policies explicitly found on the homepage HTML.
  4. Contact information is limited to contact forms; no explicit emails or phone numbers found in the HTML.
  5. Uses WordPress CMS with multiple plugins for SEO, media, and content management.
  6. HTTPS is enabled, but security headers are not detected in the HTML content.
  7. No signs of WAF or content blocking.
  8. No adult or questionable content detected.
  9. External links mostly related to school services and plugins.
  10. Tracking via Matomo analytics present without explicit cookie consent mechanism.
Technical notes

Notes

The website is built on WordPress 6.8.3 with a variety of plugins including Yoast SEO, WPBakery Page Builder, LayerSlider, Matomo Analytics, and others, indicating a mature and feature-rich infrastructure. The site uses jQuery and modern CSS techniques for responsive design. Performance is moderate, with caching and minified CSS assets observed. Mobile optimization is good with responsive menus and layouts. SEO is well addressed via Yoast SEO and structured data (JSON-LD). However, accessibility is basic and could be improved. Hosting provider details are not explicitly found. Overall, the technical implementation is solid but could benefit from enhanced security and privacy 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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