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Security report for holiseum.com

Holiseum · Technology · France

Partial score · DNS & email only

75/100

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

Holiseum is a French cybersecurity consulting firm specializing in industrial and critical infrastructure security. The company offers tailored services including advisory, auditing, securing, training, and investigation to protect OT, SCADA, and industrial systems. Positioned as a recognized player in the French cybersecurity market, Holiseum holds important national certifications such as PACS and PASSI and has strategic partnerships with entities like Integrity 360, UGAP, and ANSSI. The website reflects a professional and consistent brand image with good content quality and clear service offerings. Technically, the website is built on Webflow CMS with modern JavaScript libraries such as jQuery and bxSlider, and integrates multilingual support via Weglot. Performance and mobile optimization are good, though accessibility is basic. Security posture is strong with HTTPS enforced and no visible vulnerabilities, but lacks some security headers and explicit security policies. Privacy compliance is partial, with a privacy policy present but no cookie consent mechanism detected. Overall, Holiseum's digital presence is credible and professional, supporting its market position. However, improvements in privacy compliance and security transparency would enhance trust and regulatory adherence.

Scanned

3 of 7 checks could not complete. The site may be unreachable or blocking automated scans, so the results below cover only what could be checked. Try a rescan later.

NIS2 and GDPR posture

NIS2 outside view
Not assessed
GDPR outside view
Not assessed

Both readouts depend on the site's pages, which could not be loaded in this scan.

Priority findings

1 finding 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

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

Keep watching holiseum.com

This scan found 11 issues across 4 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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Recommended

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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
Email security
85
DNS health
85
Network security
100
Average
86
After the cap
75

Not counted

  • Security headers: did not complete in this scan.
  • GDPR outside view: did not complete in this scan.
  • 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 holiseum.com, from OffSeq Breach.

No leaked records found

Breach holds no records for holiseum.com 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

Holiseum operates in the cybersecurity sector focused on critical and industrial infrastructures, targeting sectors such as energy, transport, and government. Its business model revolves around consulting and managed services including audits, remediation, and training. The company benefits from strong market positioning supported by national certifications and memberships in cybersecurity alliances like Hexatrust and CLUSIF. Partnerships with Integrity 360 and public procurement references (UGAP, France Relance) indicate a solid ecosystem integration. The firm targets medium-sized enterprises and public sector clients requiring specialized cybersecurity expertise. Growth indicators include recent strategic alliances and participation in high-profile events like Paris 2024 Olympics security. The company leverages a networked approach and multidisciplinary expertise to differentiate itself in a competitive market.

Security posture

Holiseum demonstrates a mature security posture with HTTPS enabled and no exposed sensitive data in the website content. The presence of PACS and PASSI certifications indicates compliance with French national cybersecurity standards. However, the website lacks explicit security policies and incident response contact details, which are important for transparency and trust. No security.txt or vulnerability disclosure policy is found. The absence of cookie consent mechanisms may pose GDPR compliance risks. No vulnerable libraries or outdated scripts are detected. Overall, the security posture is strong but could be improved by publishing detailed security policies, incident response contacts, and implementing cookie consent banners.

Recommendations

  1. Implement a visible cookie consent banner to ensure GDPR compliance.
  2. Publish a dedicated security policy page outlining security frameworks and practices.
  3. Add incident response contact information, including abuse@ or security@ email addresses.
  4. Enhance HTTP security headers such as Content-Security-Policy and Strict-Transport-Security.
  5. Consider publishing a vulnerability disclosure policy or security.txt file to encourage responsible reporting.

Contact details published on the site

Addresses
Legal name
Holiseum
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Holiseum
Description
Holiseum est un cabinet de conseil spécialisé en cybersécurité industrielle, offrant des solutions sur-mesure pour la protection des systèmes industriels, OT et SCADA, ainsi que des audits, conseils et sécurisation des infrastructures critiques.
Key services
Conseiller, Auditer, Sécuriser, Former, Investiguer
Content quality
good
Branding
consistent

Technology

Stack
Webflow, jQuery, bxSlider, Google Fonts, Google Tag Manager, Weglot (multilingual plugin), Seona JS plugin
Platforms
Webflow CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of Google Tag Manager for analytics
  • Use of Weglot for multilingual support

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Marketing tools
Weglot
Transparency
basic

Site quality

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

Key observations

  1. Website is professionally designed and content-rich.
  2. Strong focus on cybersecurity for critical and industrial infrastructures.
  3. Good use of certifications and memberships as trust signals.
  4. Multilingual support via Weglot is implemented.
  5. No visible security or privacy policy pages explicitly linked in navigation.
  6. No cookie consent banner detected despite EU GDPR relevance.
  7. Contact information is limited to phone and address; no email contact found in HTML.
  8. No forms detected in the provided HTML content.
Technical notes

Notes

The website is built using Webflow CMS, leveraging modern web technologies including jQuery, bxSlider for carousels, and Google Fonts for typography. Multilingual support is provided by Weglot, enhancing accessibility for French and English speakers. Google Tag Manager is used for analytics, indicating a structured approach to data collection. The site is hosted on Webflow's CDN, providing reliable performance and HTTPS support. Mobile optimization is good, though accessibility features are basic and could be enhanced. No major technical debt or outdated technologies are evident. Performance is moderate, with room for optimization in loading speed and accessibility compliance.
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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