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Security report for slezak.de

SLEZAK Elektroanlagen GmbH · Energy · Germany

High risk. 8 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

43/100

Risk levelHigh

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

SLEZAK Elektroanlagen GmbH is a well-established German family-owned company specializing in electrical installations, switch cabinet construction, and industrial electrical services. Founded in 1987, the company operates with approximately 35 employees including apprentices, serving residential, commercial, and industrial clients. Their website reflects a professional and consistent brand image, highlighting their certifications and commitment to training the next generation of electricians. Technically, the website is built on WordPress with modern frameworks such as Bootstrap and FontAwesome, optimized for mobile devices and SEO via the Yoast plugin. Hosting appears to be managed through a German provider consistent with the company's location. The site uses HTTPS and includes privacy consent mechanisms on its contact form, though lacks a cookie consent banner and explicit security headers. From a security perspective, the site demonstrates good practices such as encrypted connections and user consent for data collection, but could improve by implementing additional security headers and publishing incident response policies. No vulnerabilities or suspicious activities were detected. The domain registration data aligns well with the business claims, supporting legitimacy. Overall, the website presents a trustworthy and professional digital presence with room for enhancement in security policies and privacy compliance. Strategic improvements in these areas would strengthen the company's risk posture and customer trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
28/ 100 · High
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 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';…

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

Keep watching slezak.de

This scan found 29 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
62
Security headers
15
Email security
65
DNS health
70
Network security
20
GDPR outside view
28
Average
43

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention slezak.de, from OffSeq Breach.

No leaked records found

Breach holds no records for slezak.de right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

SLEZAK Elektroanlagen GmbH holds a solid position in the regional energy sector, focusing on electrical installations and switch cabinet manufacturing. Their business model centers on service delivery and vocational training, targeting residential, commercial, and industrial customers. The company leverages certifications and a family-owned brand identity as competitive advantages. Their social media engagement and SEO efforts indicate an active marketing approach. Growth potential lies in expanding training programs and embracing digital transformation in energy solutions. Partnerships with local design firms and industry bodies enhance their ecosystem. The company maintains transparent contact channels and a clear corporate narrative, supporting customer confidence and operational stability.

Security posture

The website exhibits a moderate to good security maturity level with HTTPS enforced and privacy consent integrated into forms. However, the absence of security headers and incident response information indicates gaps in comprehensive security governance. No exposed sensitive data or vulnerable libraries were identified. The site does not currently provide a vulnerability disclosure policy or security.txt file, limiting transparency for security researchers. GDPR compliance is partially addressed through privacy policies and consent checkboxes, but cookie management could be improved. Overall, the security posture is adequate for the business scale but would benefit from formalized policies and enhanced technical controls.

Recommendations

  1. Implement HTTP security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web attacks.
  2. Publish a clear security policy and incident response contact information to improve transparency and preparedness.
  3. Introduce a cookie consent banner to comply fully with GDPR and inform users about tracking technologies.
  4. Regularly audit and update all WordPress plugins and core to minimize vulnerabilities.
  5. Enhance privacy compliance by appointing or disclosing a Data Protection Officer and detailing data retention policies.

Contact details published on the site

Addresses
Legal name
SLEZAK Elektroanlagen GmbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
SLEZAK Elektroanlagen GmbH
Description
Elektroinstallation und Schaltanlagenbau. Familienunternehmen mit 35 employees including 6 apprentices. Services include electrical installations for residential, commercial, and industrial buildings, switch cabinet construction, and industry installations.
Key services
Elektroinstallation, Schaltschrankbau, Industrieinstallation, Ausbildung von Elektronikern
Content quality
good
Branding
consistent

Technology

Stack
WordPress 6.8.3, Bootstrap 5.2.3, FontAwesome 6.2.1, Yoast SEO plugin, jQuery 3.7.1, Google Maps Opt-In plugin
Frameworks
Bootstrap
Platforms
WordPress
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enabled
  • Contact form includes privacy consent checkbox
  • Google Maps loaded on user consent

Analytics and tracking

Tracking level
minimal
Privacy practices
basic

Advertising

Marketing tools
Yoast SEO
Transparency
poor

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. Content is in German and professionally presented.
  3. Contact form includes GDPR-compliant consent checkbox.
  4. No cookie consent banner detected despite possible use of cookies (e.g., Google Maps).
  5. No explicit security or incident response policies published.
  6. Social media presence on Facebook and Instagram.
  7. Use of modern web technologies and SEO optimization via Yoast plugin.
Technical notes

Notes

The website is built on a modern WordPress platform using Bootstrap for responsive design and FontAwesome for icons, ensuring good mobile optimization and user experience. SEO is enhanced via the Yoast plugin with structured data (JSON-LD) implemented for rich search results. Hosting is provided by a German-based provider consistent with the company’s location. Performance is moderate with no major issues detected, though lazy loading and consent-based loading of Google Maps indicate attention to user experience and privacy. Technical debt appears low, but security headers and cookie management represent areas for modernization. Overall, the technical infrastructure supports the business needs effectively with opportunities for incremental improvements.
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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