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Security report for co2ero.de

CO2ero e.V. · Education · Germany

Medium risk. 8 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

60/100

Risk levelMedium

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

CO2ero e.V. is a German non-profit organization dedicated to climate protection through education and sustainable development initiatives primarily targeting schools and educational institutions. The organization offers workshops, campaigns, and resources to support climate action and sustainability goals, positioning itself as a niche leader recognized by UNESCO's BNE 2030 program. Their website reflects a professional and consistent brand image with clear navigation and relevant content for their target audience. Technically, the website employs modern web technologies including asynchronous JavaScript loading and Matomo analytics configured to disable cookies, indicating a privacy-conscious approach. The site is served over HTTPS with good performance and mobile optimization, though no explicit CMS or hosting provider details are evident. Accessibility is basic but functional, and SEO practices appear adequate. From a security perspective, the site benefits from HTTPS and privacy-aware analytics but lacks explicit security headers, a published privacy or cookie policy, and a vulnerability disclosure mechanism. Contact information is clearly provided, enhancing trust. The WHOIS data shows eco-friendly hosting consistent with the organization's mission but lacks detailed registrant information, slightly reducing trustworthiness. Overall, the website is safe, professional, and credible with room for improvement in privacy compliance and security best practices. No adult or questionable content is present, and the site is fully accessible without WAF or blocking mechanisms.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
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 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. 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';…

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Keep watching co2ero.de

This scan found 26 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
72
Security headers
20
Email security
75
DNS health
65
Network security
100
GDPR outside view
25
Average
60

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

CO2ero e.V. operates in the education and non-profit sectors, focusing on climate protection and sustainability education. Their business model revolves around providing workshops, campaigns, and educational materials to schools and related stakeholders. The organization leverages partnerships with recognized foundations and is endorsed by UNESCO's BNE 2030 program, enhancing its market position and credibility. Revenue streams likely include donations, grants, and membership fees. The target customers are educational institutions, educators, parents, and students interested in climate action. Growth indicators include active workshops, newsletters, and campaigns. The partnership ecosystem includes Waldorf-Stiftung, Software AG-Stiftung, and solar Lago, reflecting a strong network within the sustainability and education community.

Security posture

The website demonstrates a moderate to good security posture with mandatory HTTPS encryption and privacy-conscious analytics configuration (Matomo with disabled cookies). However, it lacks several security best practices such as explicit HTTP security headers (CSP, HSTS, X-Frame-Options), a published privacy and cookie policy, and a vulnerability disclosure or incident response contact. No vulnerabilities or exposed sensitive data were detected in the HTML content. The absence of these policies and headers represents compliance gaps, especially under GDPR and NIS2 frameworks. The organization should enhance its security posture by implementing these missing elements to improve trust and regulatory compliance.

Recommendations

  1. Publish a comprehensive privacy policy and cookie policy with a user consent mechanism to ensure GDPR compliance.
  2. Implement and configure HTTP security headers such as Content Security Policy (CSP), Strict-Transport-Security (HSTS), X-Frame-Options, and X-XSS-Protection.
  3. Establish and publish a vulnerability disclosure policy or security.txt file to facilitate responsible security reporting.
  4. Add incident response contact information, including dedicated security or abuse email addresses.
  5. Regularly audit and update third-party scripts and dependencies to mitigate potential vulnerabilities.

Contact details published on the site

Addresses
Legal name
CO2ero e.V.
Registration number
VR 703946
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
CO2ero e.V.
Description
CO2ero e.V. is a non-profit organization focused on climate protection through education and sustainable development. They work with schools and educational institutions to promote climate action, offer workshops, and provide resources and campaigns to support sustainability goals.
Key services
Workshops on climate protection and sustainability, Support for schools to create climate action plans, Campaigns like 'Standpunkt Klima' for greenhouse gas accounting, Open consultation hours for climate protection questions, Provision of educational materials and newsletters
Content quality
good
Branding
consistent

Technology

Stack
Matomo Analytics, JavaScript ES Modules, CSS Stylesheets, Lazy Loading Images
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • No cookies set by Matomo (disableCookies enabled)
  • Use of async and defer for scripts

Analytics and tracking

Services
Matomo
Tracking level
minimal
Privacy practices
basic

Advertising

Tracking pixels
Matomo
Marketing tools
Matomo Analytics
Transparency
good

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. No explicit privacy or cookie policies found despite GDPR relevance.
  3. Contact information is clearly provided in footer with phone, email, and physical address.
  4. Use of Matomo analytics with cookies disabled indicates privacy-conscious tracking.
  5. Website content is focused on climate education and non-profit activities.
  6. No security.txt or vulnerability disclosure policy found.
  7. Site uses HTTPS and modern script loading techniques.
  8. Branding and design are consistent and professional.
  9. External links mostly point to partner organizations and related educational resources.
Technical notes

Notes

The website uses modern web technologies including asynchronous and deferred JavaScript loading, CSS stylesheets, and lazy loading for images to optimize performance. Matomo analytics is integrated with cookies disabled, reflecting a privacy-aware approach. The site is served over HTTPS, ensuring secure communication. No explicit CMS or hosting provider is identified from the HTML content. The site is mobile optimized with good navigation and SEO practices. However, the absence of explicit security headers and privacy policies indicates technical debt in security and compliance areas. Performance is moderate, with opportunities to improve accessibility and implement advanced SEO and security 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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