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Security report for host-bioenergy.com

HoSt Bioenergie · Energy · Netherlands

Medium risk. 4 critical or high findings in Security headers and GDPR outside view.

Security score

71/100

Risk levelMedium

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

HoSt Bioenergie is a Netherlands-based energy technology company specializing in renewable natural gas (RNG) and renewable heat and power generation systems. Positioned as a global leader, the company operates across 35+ countries with a portfolio of over 450 projects. Their offerings include biogas plants, biomass and waste-fired boiler plants, and advanced technologies such as carbon capture and biogas upgrading. The website reflects a mature digital presence with multi-language support and comprehensive project showcases. Technically, the website is built on WordPress with modern SEO and performance optimizations including Yoast SEO Premium, Gravity Forms, and WP Rocket. It employs Google Tag Manager and Cookiebot for analytics and consent management, indicating a focus on privacy compliance. The site is mobile-optimized and accessible with good SEO practices. Security posture is solid with HTTPS enforced and cookie consent mechanisms in place. However, explicit security headers and policies are not fully implemented, and no incident response or vulnerability disclosure information is provided. The absence of WHOIS data for the domain raises concerns about domain registration legitimacy, which should be investigated further. Overall, the website presents a professional and trustworthy front for a renewable energy technology company, but improvements in transparency around security policies and domain registration are recommended to enhance trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 100 · Medium
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 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 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

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

Keep watching host-bioenergy.com

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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
95
Security headers
30
Email security
75
DNS health
75
Network security
100
GDPR outside view
53
Average
71

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

HoSt Bioenergie operates in the renewable energy sector with a focus on RNG and biomass technologies. Their business model centers on providing high-tech energy systems and related services globally. The company targets industrial clients and organizations aiming to achieve sustainability goals. Their competitive advantage lies in proprietary technologies and a broad portfolio that includes biogas upgrading, CO2 liquefaction, and carbon capture. The company maintains a strong partnership ecosystem, including the HoSt Group, and actively showcases projects worldwide. Growth indicators include extensive project experience and global reach. The website supports multiple languages, indicating a diverse international customer base.

Security posture

The website demonstrates a moderate to good security maturity level with HTTPS and cookie consent mechanisms implemented. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. However, the lack of explicit security headers such as Content-Security-Policy and absence of a published security policy or incident response contact reduce the overall security posture. There is no evidence of a vulnerability disclosure program or security.txt file. Compliance with GDPR is indicated through privacy and cookie policies. Incident response readiness and security culture indicators are not visible on the site, suggesting room for improvement in transparency and preparedness.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  2. Publish a clear security policy and incident response contact information on the website to improve transparency and readiness.
  3. Establish and publicize a vulnerability disclosure program or security.txt file to encourage responsible reporting of security issues.
  4. Verify and update domain WHOIS registration information to ensure legitimacy and build trust with visitors and partners.
  5. Continue maintaining GDPR compliance and enhance user privacy controls with clear data retention policies.

Contact details published on the site

Addresses
Legal name
HoSt Bioenergie
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
HoSt Bioenergie
Description
HoSt Energy Systems is the energy technology leader offering renewable natural gas (RNG) technology, heat & power systems. Revolutionizing energy with high-tech energy systems.
Key services
Biogas plants, Biomass & waste-fired boiler plants, Gasification, Energy as a Service, Service & maintenance
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress, Yoast SEO Premium, Gravity Forms, Google Tag Manager, Cookiebot, WP Rocket
Platforms
WordPress CMS
Performance
fast
Mobile
excellent
Accessibility
good
SEO
excellent

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML
  • Use of Google Tag Manager with consent settings denying ad personalization

Analytics and tracking

Services
Google Tag Manager
Tracking level
minimal
Privacy practices
good

Advertising

Marketing tools
Cookiebot
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. Content is comprehensive and focused on renewable energy solutions
  3. Multiple language versions available
  4. Active social media presence
  5. No WHOIS data available, domain registration status unclear
  6. Good privacy and cookie compliance
  7. No explicit security policy or incident response information found
Technical notes

Notes

The website is built on a modern WordPress platform with a well-structured theme and optimized for performance using WP Rocket. SEO is enhanced by Yoast SEO Premium, and user interaction is managed via Gravity Forms. Google Tag Manager is used for analytics with consent settings that restrict ad personalization, reflecting privacy-conscious design. The site is mobile responsive and accessible, with multiple language versions supported. No major technical debt or outdated libraries were detected. Hosting provider details are not explicit, but performance indicators suggest a reliable infrastructure. Opportunities exist to improve security header implementation and formalize security policies.
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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