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Security report for nabu.de

NABU - Naturschutzbund Deutschland e.V. · Non-profit · Germany

Medium risk. 4 critical or high findings in Security headers and SSL/TLS.

Security score

69/100

Risk levelMedium

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

NABU - Naturschutzbund Deutschland e.V. is a well-established German non-profit organization dedicated to nature and environmental conservation for over 125 years. The website serves as a comprehensive platform for information, engagement, and fundraising, targeting environmentally conscious individuals and supporters in Germany. It offers rich content including news, campaigns, educational resources, and multiple ways for users to participate or donate. Technically, the website is built on the IMPERIA CMS platform and integrates modern web technologies such as Matomo analytics, Klaro for cookie consent, and various social media and marketing pixels. The site is mobile-optimized, accessible, and SEO-friendly, reflecting a mature digital infrastructure. From a security perspective, the site enforces HTTPS, uses cookie consent management, and employs security cookies for form protection. No critical vulnerabilities or exposed sensitive data were detected. However, explicit security headers could be verified and a formal security policy or vulnerability disclosure mechanism could enhance trust. Overall, NABU's website demonstrates a strong security posture, excellent content quality, and good privacy compliance. It effectively supports the organization's mission and engagement goals while maintaining user trust and regulatory adherence.

Scanned

This is an earlier scan of nabu.de. View the latest report

NIS2 and GDPR posture

GDPR outside view
83/ 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 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. 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 Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

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

Keep watching nabu.de

This scan found 24 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
77
Security headers
20
Email security
70
DNS health
65
Network security
100
GDPR outside view
83
Average
69

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 nabu.de, from OffSeq Breach.

Total records
27
Employees
0
Customers
27
Third parties
0
Weak passwords
7%

3 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 nabu.de.

Select it in the checkout above.

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

Technical appendix

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

Business context

Business profile

NABU holds a leading position in the German environmental non-profit sector, leveraging a large membership base and diverse funding streams including donations and partnerships. Its business model focuses on advocacy, education, and community involvement. The organization maintains a broad partnership ecosystem, including regional branches and related platforms like NABU-Shop and NABU-Wissen. The website reflects strategic digital maturity with integrated marketing and analytics tools, supporting growth and outreach. NABU's transparent communication and comprehensive service offerings position it as a trusted authority in nature conservation.

Security posture

The website exhibits a mature security posture with enforced HTTPS, cookie consent management, and use of security cookies for bot detection on forms. Tracking and marketing pixels are consent-controlled, aligning with GDPR requirements. No critical security issues or vulnerabilities were found in the analyzed content. The absence of a published security policy or incident response contact is a minor gap. Overall, the security culture appears proactive, balancing user privacy and organizational needs effectively.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and incident response procedures.
  2. Implement and publish a security.txt file to facilitate vulnerability disclosures.
  3. Verify and enforce additional security headers such as X-Frame-Options and X-Content-Type-Options.
  4. Regularly audit third-party scripts and update them to mitigate emerging vulnerabilities.
  5. Enhance transparency around data retention policies for analytics and tracking data.

Contact details published on the site

Addresses
Legal name
NABU - Naturschutzbund Deutschland e.V.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
NABU - Naturschutzbund Deutschland e.V.
Description
Der NABU ist seit 125 Jahren ein Zuhause für alle, die sich für unsere Natur und Umwelt engagieren. Naturschutz kann jede*r.
Key services
Nature and species protection, Environmental education, Campaigns and projects, Membership and volunteer engagement, Information and advice services
Content quality
excellent
Branding
consistent

Technology

Stack
IMPERIA CMS 8.6.0, Matomo Analytics, Klaro Cookie Consent, ReadSpeaker, Swiper.js, FontAwesome, YouTube embedded videos, Google Tag Manager, TikTok Pixel, Facebook Pixel
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent management via Klaro
  • No exposed sensitive data in HTML
  • Use of security cookies for forms (MT Captcha)
  • No visible vulnerable libraries

Analytics and tracking

Services
Matomo, Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Ads
Tracking pixels
Facebook Pixel, TikTok Pixel
Marketing tools
Matomo Analytics
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed and well-structured
  2. Strong focus on environmental and nature conservation topics
  3. Multiple user engagement options including donations, memberships, and volunteering
  4. Comprehensive cookie consent and privacy management
  5. Use of modern web technologies and analytics tools
  6. No signs of malicious or suspicious activity
  7. Clear contact information and social media presence
Technical notes

Notes

The website uses IMPERIA CMS 8.6.0, a mature content management system suitable for large organizations. It integrates Matomo for privacy-friendly analytics and Klaro for cookie consent management, reflecting GDPR compliance. The front-end employs modern JavaScript libraries like Swiper.js for UI components and ReadSpeaker for accessibility. Embedded videos use privacy-enhanced YouTube iframes. Performance is moderate with good mobile optimization and accessibility features. Hosting appears stable with no signs of downtime or blocking. Opportunities exist to modernize security headers and further optimize performance metrics.
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. 69/100 +2Medium32 findingsView report
  2. 67/100Medium33 findingsView report
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