Skip to main content

Security report for tesvolt-ocean.com

TESVOLT OCEAN GmbH · Energy · Germany

High risk. 8 critical or high findings in Network security, Security headers and 2 other checks.

Security score

49/100

Risk levelHigh

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

TESVOLT OCEAN GmbH is a specialized provider of high-performance battery storage solutions tailored for maritime applications, including sea and inland waterways. Their product portfolio includes the Kaptein Series and EOH battery systems, which emphasize innovation, reliability, and compliance with maritime standards such as DNV certification. The company targets maritime operators seeking efficient and flexible energy storage solutions. Technically, the website is built on the CIDEMOS CMS platform with modern JavaScript and CSS technologies, featuring responsive design and good SEO practices. Security posture is moderate with HTTPS usage but lacks explicit security headers and detailed security policies. The absence of WHOIS registration data raises concerns about domain legitimacy, although the website content and structured data strongly indicate a legitimate German-based business. Privacy and cookie policies are present and GDPR compliant, but no direct contact emails or phone numbers are visible on the site. Overall, the website is professional and trustworthy in appearance but requires verification of domain registration and enhancement of security best practices.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 100 · Medium
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. Network security

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

    • Critical

      Critical Service Exposed: SMB

      Port 445 (SMB) is publicly accessible - SMB - Windows file sharing, high risk

      What to do: Immediately restrict access to SMB using firewall or VPN

      • 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
    • Critical

      Critical Service Exposed: MySQL

      Port 3306 (MySQL) is publicly accessible - MySQL - Database server

      What to do: Immediately restrict access to MySQL using firewall or VPN

      • 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

  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 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';…

  3. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

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

Keep watching tesvolt-ocean.com

This scan found 26 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

Email alerts on material changes and an exportable JSON history of every change.

Billed monthly to your card. Cancel anytime. See sample alerts.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

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
60
Email security
55
DNS health
75
Network security
0
GDPR outside view
68
Average
55
After the cap
49

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 · found on this site
  • 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

TESVOLT OCEAN operates in the energy and transportation sectors, focusing on maritime battery storage solutions. Their business model is B2B, supplying innovative and certified battery systems to marine vessel operators. The company leverages certifications like DNV to establish trust and market differentiation. Their digital presence includes social media engagement on major platforms, supporting brand visibility. The lack of WHOIS data is a notable anomaly that could impact trust. The company appears small but specialized, with a consistent brand and professional content. No evidence of partnerships or subsidiaries was found beyond the web design agency. The business is positioned as a niche innovator in maritime energy storage, with growth potential tied to maritime electrification trends.

Security posture

The website enforces HTTPS, indicating basic transport security. However, no security headers such as Content Security Policy, HSTS, or X-Frame-Options were detected, which are recommended to mitigate common web attacks. No incident response or security policy information is published, and no vulnerability disclosure or security.txt files are present. The absence of contact emails and phone numbers limits direct communication channels for security or abuse reporting. No known vulnerabilities or exposed sensitive data were identified in the HTML content. Overall, the security posture is moderate but could be significantly improved by implementing security headers, publishing security policies, and providing clear incident response contacts.

Recommendations

  1. Verify and update domain WHOIS registration to ensure transparency and trust.
  2. Implement standard security headers (CSP, HSTS, X-Frame-Options) to enhance web security.
  3. Publish a dedicated security policy and incident response contact information on the website.
  4. Add explicit company contact emails and phone numbers for customer and security communications.
  5. Regularly audit and update privacy and cookie consent mechanisms to maintain GDPR compliance.

Contact details published on the site

Addresses
Legal name
TESVOLT OCEAN GmbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
TESVOLT OCEAN GmbH
Description
TESVOLT OCEAN provides high-performance battery storage systems for marine use, designed for the toughest conditions at sea and inland waterways.
Key services
Kaptein Series battery systems, EOH 1.1 battery system, EOH 1.0 battery system
Content quality
good
Branding
consistent

Technology

Stack
CIDEMOS CMS 1.3.1-80, JavaScript, CSS, Swiper.js slider
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • HTTPS enforced (implied by canonical and og:url https)
  • No visible exposed sensitive data
  • No vulnerable libraries detected in scripts

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Transparency
basic

Site quality

Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
high

Key observations

  1. Website is fully accessible with rich content and navigation
  2. No WHOIS data available, raising domain legitimacy questions
  3. Professional maritime battery storage solutions provider
  4. No visible security policy or incident response information
  5. Privacy and cookie policies are present and GDPR compliant
  6. No contact emails or phone numbers explicitly found in HTML content
  7. Social media presence on Facebook, LinkedIn, YouTube, Instagram
  8. No analytics or tracking scripts detected in provided HTML
  9. No advertising or affiliate marketing detected
Technical notes

Notes

The website uses the CIDEMOS CMS platform version 1.3.1-80 with JavaScript and CSS for frontend interactivity and styling. It employs the Swiper.js library for slider functionality. The site is mobile responsive with good SEO metadata including Open Graph and JSON-LD structured data for organization and webpage schema. Performance is moderate with preloaded fonts and asynchronous script loading. Accessibility is basic but could be improved with ARIA landmarks and better keyboard navigation support. No analytics or tracking scripts were detected, indicating minimal user tracking. Hosting provider details are not disclosed in the HTML content. Overall, the technical infrastructure is modern and functional but could benefit from enhanced accessibility and security 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

Reviews of this site

Share your experience with tesvolt-ocean.com. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review tesvolt-ocean.com.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.