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Security report for schleswigernetz-sh.de

Schleswiger Stadtwerke GmbH · Energy · Germany

Medium risk. 3 critical or high findings in Email security, SSL/TLS and 1 other check.

Security score

64/100

Risk levelMedium

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

Schleswiger Stadtwerke GmbH operates as a regional municipal utility network provider in Schleswig, Germany, managing electricity, gas, heat, water, wastewater, and fiber optic networks. The company is part of a partnership with Stadtwerke Schleswig-Holstein and other regional utilities, positioning itself as a reliable infrastructure partner for residents and businesses in the region. The website reflects a professional and consistent brand presence with clear information about services and partnerships. Technically, the site is built on TYPO3 CMS and employs Cookiebot for GDPR-compliant cookie consent management, indicating a moderate level of digital maturity. Security posture is adequate with HTTPS and consent mechanisms in place, but lacks explicit security policies, incident response contacts, and advanced security headers. Overall, the site is trustworthy and well-maintained but could improve transparency and security documentation to enhance compliance and user trust.

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

3 findings rated critical or high. Fix these first.

  1. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  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

  3. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • High

      High-Risk Service Exposed: FTP

      Port 21 (FTP) is publicly accessible - FTP - Often unencrypted file transfer

      What to do: Consider restricting access to FTP or implementing strong authentication

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

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

Keep watching schleswigernetz-sh.de

This scan found 21 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
90
Email security
60
DNS health
60
Network security
20
GDPR outside view
83
Average
64

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 holds a solid market position as a municipal utility network operator serving multiple energy sectors and infrastructure services. Its business model focuses on stable and modern infrastructure provision with a strong regional partnership ecosystem. The website content targets local customers and market partners, providing relevant forms and information. The partnership with Stadtwerke SH enhances its competitive advantage through shared expertise and resources. Growth indicators include infrastructure modernization and digital service portals. However, the absence of detailed business registration data and contact channels online limits deeper business intelligence insights.

Security posture

The website demonstrates a baseline security posture with HTTPS enabled and a robust cookie consent mechanism via Cookiebot. However, it lacks visible security headers such as Content-Security-Policy or X-Frame-Options, and no published security or incident response policies are found. There is no evidence of vulnerability disclosure programs or security certifications. The absence of contact emails or phone numbers for security incidents reduces incident response readiness. Overall, the security maturity is moderate but could benefit from enhanced transparency, policy publication, and technical security controls.

Recommendations

  1. Publish a comprehensive privacy policy and terms of service pages linked prominently on the website.
  2. Implement and disclose a formal security policy and incident response contact information.
  3. Add security HTTP headers (Content-Security-Policy, X-Frame-Options, etc.) to improve protection against common web attacks.
  4. Regularly audit and minimize third-party scripts and cookies to reduce privacy risks.
  5. Enhance contact information with verified company emails and phone numbers for customer and security inquiries.

Contact details published on the site

Addresses
Legal name
Schleswiger Stadtwerke GmbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Schleswiger Stadtwerke GmbH
Description
Wir sorgen für den verlässlichen und reibungslosen Betrieb unserer Schleswiger Stadtwerke GmbH Netze. Wir investieren in moderne und stabile Netze, um die Infrastruktur zukunftsfähig zu halten. Wir sind Partner der Stadtwerke SH und betreiben Netze in Schleswig und der Region.
Key services
Electricity network operation, Gas network operation, Heat network operation, Water supply, Wastewater management, Fiber optic network, House connection services, Market partner information, Energy efficiency information
Content quality
good
Branding
consistent

Technology

Stack
TYPO3 CMS, Cookiebot, JavaScript, CSS
Frameworks
TYPO3
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Cookie consent management implemented

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Tracking pixels
Cookiebot pixel
Marketing tools
Cookiebot
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 and not blocked by WAF or security challenges.
  2. Content is professionally presented and relevant to municipal utility services.
  3. Cookie consent is managed via Cookiebot with detailed cookie categories.
  4. No explicit privacy policy or terms of service pages found in the provided content.
  5. Contact information is limited to physical address; no emails or phone numbers explicitly found.
  6. No social media links detected in the provided content.
  7. Website uses TYPO3 CMS and is hosted with domaincontrol.com nameservers.
  8. No security headers or advanced security policies explicitly visible in the content.
  9. No vulnerability disclosure or incident response information found.
Technical notes

Notes

The website is built on TYPO3 CMS, a mature and widely used content management system, indicating a stable technical foundation. The use of Cookiebot for cookie consent shows compliance with GDPR requirements. Hosting is managed via domaincontrol.com nameservers, suggesting use of GoDaddy or related hosting services. The site is mobile optimized and accessible with skip links and accessibility options. Performance is moderate with compressed CSS and asynchronous JavaScript loading. However, no advanced frameworks or modern frontend technologies are detected. SEO and metadata are adequately implemented with canonical links and JSON-LD breadcrumbs. Technical risks include lack of visible security headers and limited transparency on backend infrastructure.
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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