Skip to main content

Security report for agence-lissen.com

Lissen · Transportation · France

Medium risk. 10 critical or high findings in Security headers, GDPR outside view and 3 other checks.

Security score

53/100

Risk levelMedium

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

Lissen is a French communication agency specializing in global communication services focused on territorial transition projects. Founded in 2023, it operates as a small agency under the Copylot group, serving clients primarily in transportation and energy sectors. The agency offers key services including communication for large projects, citizen participation and consultation, and 3D visualization and immersion. The website is professionally designed, mobile-optimized, and provides clear contact and team information, enhancing its market credibility. Technically, the website is built on WordPress with modern libraries such as Bootstrap 5 and jQuery, hosted by OVH sas. Performance is fast, and SEO and accessibility are well implemented. The site uses GDPR-compliant cookie consent via Tarteaucitron. However, DNSSEC is not enabled and security headers are not detected, indicating room for security improvements. Security posture is good with HTTPS enforced and domain status protections in place, but lacks explicit security policies or incident response information. No vulnerabilities or exposed sensitive data were detected. Privacy compliance is strong with a clear privacy policy and cookie consent mechanism. Overall, the website presents a low risk profile with strong business credibility and technical maturity. Strategic recommendations include enabling DNSSEC, adding security headers, and publishing security and incident response policies to further enhance trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 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

10 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 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';…

  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

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

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

Keep watching agence-lissen.com

This scan found 20 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. The full timeline opens with your unlock code.

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
77
Security headers
35
Email security
65
DNS health
85
Network security
20
GDPR outside view
35
Average
53

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

Lissen occupies a niche market as a communication agency focused on territorial and infrastructure projects, serving public and private sector clients such as SNCF Réseau and VINCI Autoroutes. Its competitive advantage lies in combining strategic communication with innovative 3D visualization and citizen engagement tools. The business model is service-based, targeting project owners, engineering firms, and local authorities involved in territorial transitions. The agency's affiliation with Copylot group provides additional market strength. Growth indicators include recent domain registration and active content updates. The partnership ecosystem includes Copylot and Mediapilote. The company maintains a professional online presence with clear branding and client references.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and domain registration protections (clientDeleteProhibited, clientTransferProhibited). However, DNSSEC is not enabled, and no security headers were detected in the provided data, which are recommended best practices. No incident response or security policy information is publicly available, which could be improved to enhance transparency and readiness. The cookie consent mechanism is GDPR compliant, indicating awareness of privacy regulations. No vulnerabilities or exposed sensitive data were found. Overall, the security posture is good but could benefit from additional hardening and policy disclosures.

Recommendations

  1. Enable DNSSEC on the domain to improve DNS security and prevent spoofing.
  2. Implement security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security to enhance browser security.
  3. Publish a clear security policy and incident response plan on the website to improve transparency and preparedness.
  4. Regularly audit and update third-party scripts and plugins to mitigate vulnerabilities.
  5. Enhance analytics and tracking transparency by documenting data retention and processing policies.

Contact details published on the site

Addresses
Legal name
Lissen
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Lissen
Description
Lissen, l’agence de communication globale, s’est construite en accompagnant nos clients dans le cadre de projets d’aménagement des territoires.
Key services
Communication des grands projets, Concertation et participation citoyenne, Visualisation et immersion 3D
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress, PHP, jQuery, Bootstrap 5, Slick Carousel, Popper.js, Tarteaucitron (cookie consent)
Frameworks
WordPress
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • ClientDeleteProhibited and ClientTransferProhibited domain status

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Tracking pixels
tarteaucitron.io
Marketing tools
popup-by-supsystic
Transparency
basic

Site quality

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

Key observations

  1. Website is professionally designed and well-structured.
  2. Content is focused on communication services for territorial and infrastructure projects.
  3. Clear contact information and team presentation enhance trust.
  4. Use of GDPR-compliant cookie consent mechanism.
  5. No security policy or incident response information publicly available.
  6. No DNSSEC enabled; security headers not detected in provided data.
  7. No analytics services explicitly detected; minimal user tracking observed.
  8. No advertising networks detected beyond popup marketing tool.
  9. Domain registration and website content are consistent and legitimate.
Technical notes

Notes

The website is built on WordPress CMS with a modern tech stack including Bootstrap 5, jQuery, Slick Carousel, and Popper.js. It uses Tarteaucitron for cookie consent management, indicating GDPR compliance. Hosting is provided by OVH sas, a reputable provider. Performance is fast with preloading and lazy loading techniques observed. The site is mobile-optimized and accessible with good SEO metadata and structured data (JSON-LD). No broken scripts or errors were detected. Opportunities exist to enable DNSSEC and add security headers to reduce technical risks. Overall, the technical infrastructure is solid and supports the business needs effectively.
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 agence-lissen.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 agence-lissen.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.