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Security report for saarbruecker-stadtwerke.de

Stadtwerke Saarbrücken Konzern · Energy · Germany

Medium risk. 6 critical or high findings in GDPR outside view and Security headers.

Security score

68/100

Risk levelMedium

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

Stadtwerke Saarbrücken is a large regional utility and transport company serving the Saarbrücken area in Germany. With approximately 1,200 employees, it provides essential services including electricity, district heating, water, gas, and public transportation via the Saarbahn. The company emphasizes sustainability and regional economic development, holding certifications such as a family-friendly company. The website reflects a mature digital presence with professional design, good navigation, and mobile optimization. Technically, it uses a custom CMS with modern JavaScript libraries and frameworks, served via Apache with TLS 1.3 support and secure HTTP headers, though it lacks HSTS and DMARC records. Security posture is solid with no detected vulnerabilities, but improvements in email security and cookie consent are recommended. Overall, the site is trustworthy and well-positioned in its market niche.

Scanned

This is an earlier scan of saarbruecker-stadtwerke.de. View the latest report

NIS2 and GDPR posture

GDPR outside view
18/ 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

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

  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 saarbruecker-stadtwerke.de

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  • TLS certificates and expiry
  • DNS records
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  • 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
97
Security headers
45
Email security
70
DNS health
75
Network security
100
GDPR outside view
18
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

The company operates in the energy, water, and transportation sectors, targeting both private and business customers in the Saarbrücken region. Its business model focuses on integrated utility services and public transport, leveraging regional partnerships such as with Saarbahn and Saarbrücker Bäder. The presence of a digital meter reading service and smart energy initiatives indicates a move towards digital transformation. The company maintains a strong local market position as a major employer and service provider. Its partnership ecosystem includes related service platforms and regional municipal websites. Growth indicators include ongoing infrastructure projects like district heating expansion and digitalization efforts.

Security posture

The website demonstrates a good security maturity level with HTTPS enforced, modern TLS protocols, and several security headers like XSS protection and content type options. OCSP stapling is enabled, enhancing certificate validation performance. No weak cipher suites or known SSL vulnerabilities were detected. However, the absence of HSTS and DMARC records represents a gap in enforcing strict transport security and email authentication, respectively. No explicit incident response or vulnerability disclosure policies were found. The site uses secure cookies with HttpOnly and Secure flags, but lacks a cookie consent mechanism, which may impact privacy compliance. Overall, the security posture is strong but could be enhanced with additional policies and DNS records.

Recommendations

  1. Enable HTTP Strict Transport Security (HSTS) with includeSubDomains and preload to enforce HTTPS and prevent downgrade attacks.
  2. Implement DMARC DNS records to improve email security and prevent spoofing.
  3. Add CAA DNS records to restrict which certificate authorities can issue certificates for the domain.
  4. Introduce a cookie consent banner or mechanism to comply with privacy regulations and inform users about tracking.
  5. Publish a vulnerability disclosure policy and incident response contact information to enhance transparency and security culture.
Technical notes

Notes

The website is hosted on an Apache server with Varnish caching, indicating a robust infrastructure. It uses a custom CMS with modern front-end libraries including jQuery 3.7.1, Owl Carousel, Air Datepicker, Foundation framework, Select2, and Smartbanner for mobile app promotion. The site is optimized for mobile devices and accessibility, with ARIA labels and responsive design. Performance is fast with no reported load time issues. SEO is supported by proper meta tags, canonical links, and Open Graph images. The DNS setup is standard but lacks DNSSEC and CAA records. SSL certificates cover both www and root domains and are valid for 97 more days. Overall, the technical implementation is modern and well-maintained with room for security enhancements.
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. 52/100Medium25 findings · partial scanView report
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