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Security report for gastech.dk

Gastech-Energi A/S · Energy · Denmark

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

Security score

68/100

Risk levelMedium

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

Gastech-Energi A/S is a Danish energy company specializing in the sale, installation, and maintenance of gas boilers and heat pumps. The company offers service agreements that provide customers with reliable support and maintenance throughout the heating season. Positioned as a trusted provider in Denmark, Gastech-Energi leverages a strong brand presence supported by customer reviews and active social media channels. The website is designed to serve both private and commercial customers, providing tools such as savings calculators and self-service portals to enhance customer engagement. Technically, the website is built on WordPress using the Understrap theme framework and integrates modern technologies including Google Tag Manager, Google Analytics, and CookieInformation for privacy compliance. The site demonstrates good SEO practices with comprehensive metadata and structured data, ensuring strong search engine visibility. Mobile optimization and user experience are well addressed, although accessibility features could be improved. From a security perspective, the site enforces HTTPS and employs a detailed cookie consent mechanism aligned with GDPR requirements. While some security headers are not explicitly detected, no critical vulnerabilities or exposed sensitive data were found. The absence of WHOIS data limits domain trust verification, but the overall digital footprint and compliance posture suggest a legitimate and professionally managed online presence. Overall, Gastech-Energi's website reflects a mature digital infrastructure supporting its business goals, with room for enhancements in security headers and accessibility to further strengthen its security posture and user inclusivity.

Scanned

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 gastech.dk

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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Recommended

€25per month

  • 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
15
Email security
85
DNS health
60
Network security
100
GDPR outside view
83
Average
68

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

Gastech-Energi operates in the Danish energy sector, focusing on heating solutions such as gas boilers and heat pumps. The company targets homeowners and businesses seeking energy-efficient heating options and maintenance services. Its business model combines product sales with service agreements, creating recurring revenue streams and customer retention. The website's integration of savings calculators and detailed product information supports informed purchasing decisions, enhancing competitive advantage. The company benefits from its affiliation with the Ariston Group, which may provide additional resources and market reach. The presence of customer reviews and active social media engagement indicates a customer-centric approach and a growing partnership ecosystem. Strategic observations include leveraging digital tools for customer self-service and maintaining compliance with evolving privacy regulations to sustain trust and market position.

Security posture

The website demonstrates a solid security foundation with mandatory HTTPS encryption and a comprehensive cookie consent framework that categorizes cookies by purpose and duration. The use of third-party scripts is managed with transparency, and no sensitive data leakage was detected in the HTML content. However, the absence of explicit security headers such as Content-Security-Policy and X-Frame-Options suggests opportunities for hardening against common web attacks. No public incident response or vulnerability disclosure information was found, which could be improved to enhance security culture and readiness. The lack of WHOIS data reduces domain trust but does not directly impact website security. Overall, the security posture is good but would benefit from implementing additional HTTP security headers and formalizing incident response channels.

Recommendations

  1. Implement and enforce HTTP security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web vulnerabilities.
  2. Establish and publish a vulnerability disclosure policy or security.txt file to encourage responsible reporting and improve incident response readiness.
  3. Enhance accessibility features to comply with WCAG standards, improving inclusivity and user experience for all visitors.
  4. Regularly audit and update all WordPress plugins and themes to minimize risks from outdated or vulnerable components.
  5. Consider publishing explicit data protection officer contact information and security policies to strengthen GDPR compliance transparency.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Gastech-Energi A/S
Description
Vi holder øje med dit gasfyr og din varmepumpe. Få en serviceaftale til dit gasfyr eller din varmepumpe med gratis hjælp i hele fyringssæsonen.
Key services
Service agreements for gas boilers and heat pumps, Sales and installation of heat pumps and gas boilers, Customer support and self-service portals
Content quality
good
Branding
consistent

Technology

Stack
WordPress, Yoast SEO, Google Tag Manager, Google Analytics, jQuery, Slick Carousel, Popper.js, CookieInformation consent management
Frameworks
Understrap (WordPress theme framework)
Platforms
WordPress CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with detailed cookie categories
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Ads, Facebook
Tracking pixels
Facebook Pixel, Pinterest, YouTube
Marketing tools
CookieInformation
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. Comprehensive cookie consent mechanism implemented with detailed categories and third-party cookie disclosures.
  3. No explicit email addresses or phone numbers found in the main HTML content; contact likely via contact form.
  4. Strong use of SEO and structured data (JSON-LD) for enhanced search engine visibility.
  5. Social media presence on Facebook, LinkedIn, and YouTube is linked and consistent.
  6. No explicit security.txt or vulnerability disclosure page found.
  7. No explicit data protection officer contact found.
  8. WHOIS data unavailable, limiting domain trust verification.
Technical notes

Notes

The website is powered by WordPress CMS with the Understrap theme framework, leveraging modern JavaScript libraries such as jQuery and Popper.js for UI interactions. SEO is enhanced through Yoast SEO Premium plugin and structured data in JSON-LD format, improving search engine indexing and rich results. Performance is moderate, with use of CDN for static assets and asynchronous loading of scripts. Cookie consent management is handled by CookieInformation, providing granular user control. The site is mobile-optimized and features a responsive design. Technical risks include potential lack of some security headers and reliance on multiple third-party scripts which require ongoing monitoring. Opportunities exist to improve accessibility and security hardening to reduce technical debt and enhance operational resilience.
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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