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Security report for leoni.com

LEONI Group · Transportation · Germany

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

Security score

66/100

Risk levelMedium

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

LEONI Group is a global enterprise specializing in innovative cable and wiring systems primarily for the automotive and mobility sectors. The company positions itself as a key player shaping the future of mobility through advanced manufacturing solutions. Their website reflects a professional corporate presence with a focus on product offerings such as low and high voltage wiring harnesses and integrated system solutions. Technically, the website is built on TYPO3 CMS and employs Cookiebot for GDPR-compliant cookie management, indicating a mature digital infrastructure. Security posture is strong with HTTPS enforced and cookie consent mechanisms in place, though there is room for improvement in security headers and explicit incident response contacts. The absence of WHOIS data introduces some uncertainty regarding domain registration transparency but does not detract significantly from the overall legitimacy given the professional content and branding. Strategic recommendations include enhancing security headers, publishing a security policy, and improving contact transparency to bolster trust and compliance.

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. 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

  2. DNS health

    DNS sends visitors and email to the right servers. Misconfigured records can cause outages or let someone redirect your traffic.

    • High

      Potential Subdomain Takeover

      Subdomain blog.leoni.com points to unregistered service leoni-website-live-519859459.eu-central-1.elb.amazonaws.com

      What to do: Remove or fix CNAME record to prevent subdomain takeover

      • WSTG-CONF-10
      • NIS2 21(2)(i)
      • IR 2024/2690 12.4: Implementing Regulation (EU) 2024/2690, Annex point 12.4: Asset inventory
      • NIST CM-8: NIST SP 800-53 Rev. 5 CM-8: System Component Inventory

  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 leoni.com

This scan found 19 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.

Daily monitoring

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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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
85
Email security
85
DNS health
50
Network security
20
GDPR outside view
83
Average
66

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 leoni.com, from OffSeq Breach.

Total records
743
Employees
95
Customers
257
Third parties
391
Weak passwords
21%

Latest record dated 2026-05-27 · 17 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for leoni.com.

Select it in the checkout above.

Masked preview

  • –leoni-guest.leoni.com2026-05-27
  • –auth-portal-emea01.leoni.com2026-05-23
  • –leoni-guest.leoni.com2026-05-16
  • –auth-portal.leoni.com2026-05-16
  • –leoni-guest.leoni.com2026-05-15

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Open in Breach(opens in a new tab)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

LEONI Group operates in the transportation and manufacturing sectors, focusing on wiring systems for automotive and mobility markets. Their business model revolves around supplying specialized cable solutions and integrated systems to vehicle manufacturers and related industries. The company targets industry professionals and business partners globally, supported by a multilingual website and worldwide locations. Their market position is that of an established enterprise with a broad product portfolio and sustainability initiatives. The website content and navigation support a B2B business model with detailed product and corporate information. Partnerships and subsidiary information are not explicitly detailed in the provided data, suggesting a focus on core brand messaging. The company demonstrates digital maturity through GDPR compliance and cookie management but could enhance business credibility by providing more explicit contact and certification details.

Security posture

The website demonstrates a solid security foundation with HTTPS enabled and a comprehensive cookie consent mechanism that aligns with GDPR requirements. However, the absence of explicit security headers such as Content-Security-Policy and X-Frame-Options is a gap that could expose the site to certain web-based attacks. No vulnerabilities or exposed sensitive data were detected in the HTML content. The lack of a published security policy or incident response contact information limits transparency and readiness for security incidents. There is no evidence of a vulnerability disclosure program or security.txt file, which are best practices for mature security postures. Overall, the security posture is good but can be improved by adopting additional security headers, publishing security policies, and providing clear incident response channels.

Recommendations

  1. Implement and enforce security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  2. Publish a clear security policy and incident response contact information on the website.
  3. Establish a vulnerability disclosure program and provide a security.txt file for transparency.
  4. Enhance contact information availability, including dedicated security and compliance contacts.
  5. Regularly audit WHOIS data and domain registration details to ensure transparency and trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
LEONI Group
Description
The LEONI Group is helping to shape the mobility of the future with its innovative cable and wiring systems.
Key services
Cable and wiring systems, Low voltage wiring harness, High voltage wiring systems, High voltage battery solutions, Power and data distribution, System integrated solutions
Content quality
good
Branding
consistent

Technology

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

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with granular controls
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google
Tracking pixels
Cookiebot, Usercentrics
Marketing tools
Cookiebot, Usercentrics
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 challenge.
  2. Uses TYPO3 CMS and Cookiebot for cookie consent management.
  3. No explicit contact emails or phone numbers found in the provided HTML snippet.
  4. Cookie consent is comprehensive and GDPR compliant.
  5. No visible security.txt or vulnerability disclosure page.
  6. WHOIS data is missing or not publicly available, which reduces transparency.
  7. Website content is professional and consistent with a large enterprise manufacturing business.
  8. External links mostly to trusted domains related to cookie management and Google services.
Technical notes

Notes

The website is powered by TYPO3 CMS, a robust open-source content management system, indicating a stable and scalable platform. Cookiebot is integrated for cookie consent management, reflecting compliance with privacy regulations. The site uses modern CSS and JavaScript assets with integrity hashes, suggesting attention to security and performance. The website is mobile optimized with responsive design and accessibility features such as skip-to-content links and ARIA labels. Performance appears moderate with preloading of CSS assets and asynchronous loading of scripts. No major technical debt or deprecated technologies were detected. Opportunities exist to improve security headers and enhance SEO metadata further. Overall, the technical infrastructure supports a professional corporate website with good user experience and compliance features.
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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