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Security report for centraliens-nantes.org

Centrale Nantes Alumni · Education · France

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

58/100

Risk levelMedium

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

Centrale Nantes Alumni operates a comprehensive digital platform serving the alumni, students, faculty, and recruiters associated with Centrale Nantes engineering school. The website offers a rich set of services including an alumni directory, event calendars, job board, mentoring, and community engagement tools. It is well-positioned as a key network facilitator for its target audience in France and internationally. The platform leverages modern web technologies such as Vue.js, Google Analytics, and Google Maps API to deliver a responsive and interactive user experience. Security posture is solid with HTTPS enforced and secure login options, though some security headers could be improved. Privacy policies and cookie consent mechanisms are present and GDPR compliant, reflecting good privacy practices. The domain WHOIS data is unavailable likely due to privacy protection, which is common for such organizations. Overall, the website is professional, trustworthy, and well-maintained, supporting its role as a vital alumni network hub.

Scanned

NIS2 and GDPR posture

GDPR outside view
65/ 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

5 findings rated critical or high. Fix these first.

  1. 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 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';…

  2. GDPR outside view

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

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, Twitter, LinkedIn, YouTube, Cloudflare, Google APIs

      What to do: Document all third-party data sharing in your privacy policy

  3. 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

  4. 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 centraliens-nantes.org

This scan found 22 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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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
65
Email security
60
DNS health
75
Network security
20
GDPR outside view
65
Average
58

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 platform targets a medium-sized community of approximately 20,000 alumni and students, providing career services, networking events, and community resources. Its business model is based on membership and service offerings such as job postings and coaching. The site integrates with partner alumni associations and the Centrale Nantes school ecosystem, enhancing its market position. The presence of multiple language options and international groups indicates a global outreach strategy. The use of social media and official school links strengthens its credibility and engagement. The platform's technical infrastructure supports scalability and user interaction, though hosting details are not explicit. The lack of visible company registration or VAT information is typical for non-profit alumni associations.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and secure authentication options including OAuth providers (Google, LinkedIn). No sensitive data is exposed in the HTML content. However, the absence of explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options suggests room for improvement. No vulnerabilities or malware indicators were detected in the content. Privacy and cookie policies are implemented, supporting GDPR compliance. Incident response and security policy pages are not found, which could be enhanced to improve transparency and readiness. Overall, the security posture is good but could benefit from additional header hardening and documented incident response procedures.

Recommendations

  1. Implement and enforce Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options HTTP headers to enhance security.
  2. Publish a dedicated security policy and incident response information to improve transparency and preparedness.
  3. Regularly audit third-party scripts and dependencies to mitigate potential vulnerabilities.
  4. Enhance accessibility features to improve compliance and user experience for all users.
  5. Consider publishing company registration or organizational information to strengthen business credibility.

Contact details published on the site

Addresses
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Centrale Nantes Alumni
Description
Plateforme du réseau des étudiants et diplômés de Centrale Nantes, facilitant le partage, la carrière, l'emploi, les stages, et la communauté alumni.
Key services
Alumni directory, Events and news, Job board, Mentoring and coaching, Membership and community engagement
Content quality
good
Branding
consistent

Technology

Stack
Google Analytics, Google Tag Manager, Google Maps API, jQuery, YUI, Vue.js, Swiper.js, Font Awesome, Google Fonts
Frameworks
Vue.js, YUI
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Secure login forms with OAuth options (Google, LinkedIn)
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
basic

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 no blocking or WAF challenges
  2. Content is in French with English alternate language available
  3. Strong focus on alumni networking, events, job board, and community services
  4. Multiple social media integrations and official school affiliations
  5. Use of modern web technologies and analytics tools
  6. No visible security or privacy policy gaps
  7. WHOIS data is unavailable, likely due to privacy protection
Technical notes

Notes

The website uses a modern tech stack including Vue.js for frontend interactivity, Google Analytics and Tag Manager for analytics, and Google Maps API for geolocation features. The CMS appears to be custom or proprietary, leveraging YUI and other legacy libraries alongside modern frameworks. Performance is moderate with good mobile optimization and SEO practices. The site uses multiple external resources from trusted domains. Some technical debt is indicated by the presence of older libraries like YUI. The site is well-structured with clear navigation and multilingual support. Hosting provider details are not explicit, limiting full infrastructure assessment.
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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