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Security report for sleede.com

Sleede SASU · Technology · France

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

75/100

Risk levelMedium

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

Sleede SASU is a French digital agency specializing in web and mobile design and development, leveraging technologies such as React, React Native, Ruby on Rails, and Node JS. The company targets startups, large enterprises, and internal projects, emphasizing agile and lean methodologies. Their website showcases a professional portfolio with client testimonials, indicating a strong market position within the French technology services sector. The business model focuses on delivering tailored digital products with a passion for quality and innovation. Technically, the website employs modern JavaScript libraries and frameworks, including Tiny Slider for UI components, and integrates HubSpot tools for marketing and analytics. The site is well-optimized for mobile devices, accessible, and SEO-friendly, reflecting a mature digital infrastructure. However, no CMS or hosting provider details are explicitly identified. From a security perspective, the site uses HTTPS and implements a cookie consent banner compliant with GDPR. Nonetheless, no HTTP security headers were detected, and there is no visible security policy or incident response contact information. The WHOIS data for the domain is missing or unavailable, which raises concerns about domain legitimacy and registration transparency. Despite this, the website content and business information appear credible and professional. Overall, the website scores well on content quality and technical implementation but has room for improvement in security posture and domain registration transparency. Strategic recommendations include enhancing security headers, publishing security policies, and verifying domain registration details to strengthen trust and compliance.

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 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';…

  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, Cloudflare

      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 SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching sleede.com

This scan found 17 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.

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Full report

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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
65
Security headers
50
Email security
85
DNS health
85
Network security
100
GDPR outside view
65
Average
75

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

Sleede operates as a small-sized technology agency with over a decade of experience, focusing on agile digital product development for a diverse client base including startups and large corporations. Their competitive advantage lies in their expertise across multiple modern development frameworks and a strong emphasis on UX/UI design and lean business development. Revenue streams likely derive from project-based contracts and ongoing digital service engagements. The company maintains an active partnership ecosystem through social media channels and client collaborations, as evidenced by detailed testimonials. Growth indicators include a diversified project portfolio and continuous client endorsements. The agency's operations are centered in Grenoble, France, positioning it well within the European digital services market.

Security posture

The current security maturity level of Sleede's website is moderate. The presence of HTTPS and a GDPR-compliant cookie consent mechanism are positive indicators. However, the absence of key HTTP security headers such as Content Security Policy, HSTS, and X-Frame-Options reduces the overall security posture. No explicit security or incident response policies are published, which may hinder effective communication during security events. The lack of a vulnerability disclosure policy or security.txt file further limits transparency. Data protection practices appear basic but compliant with GDPR. There is no evidence of exposed sensitive data or vulnerable libraries in the provided content. Overall, the security culture seems nascent and would benefit from formalized policies and enhanced technical controls.

Recommendations

  1. Implement comprehensive HTTP security headers including CSP, HSTS, and X-Frame-Options to mitigate common web vulnerabilities.
  2. Publish a clear security policy and incident response contact information on the website to improve transparency and readiness.
  3. Establish a vulnerability disclosure program or security.txt file to encourage responsible reporting of security issues.
  4. Conduct regular security audits of third-party scripts and dependencies to prevent introduction of vulnerabilities.
  5. Verify and update domain WHOIS information to ensure registration transparency and strengthen domain legitimacy.

Contact details published on the site

Addresses
Legal name
Sleede SASU
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Sleede SASU
Description
Nous sommes des développeurs React, React Native, Ruby on Rails, Node JS et des UX UI designers et business developers experts du Lean et développement agile.
Key services
Design web et mobile, Développement React, React Native, Ruby on Rails, Node JS, UX/UI design, Business development agile
Content quality
excellent
Branding
consistent

Technology

Stack
React, React Native, Ruby on Rails, Node JS, Tiny Slider
Frameworks
Ruby on Rails
Platforms
Web, Mobile
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
65/100
Good practices seen
  • Cookie consent banner implemented
  • No exposed sensitive data in HTML

Analytics and tracking

Services
HubSpot Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
HubSpot Analytics
Marketing tools
HubSpot collected forms, HubSpot banner
Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with rich content in French.
  2. No WAF or blocking mechanisms detected.
  3. WHOIS data unavailable or domain not found in registry.
  4. Professional agency website with portfolio and client testimonials.
  5. Privacy and cookie policies present and GDPR compliant.
  6. No explicit security policies or incident response info found.
  7. No phone numbers explicitly labeled found in content.
  8. Contact email is contact@sleede.com matching domain.
  9. Social media presence on Twitter and Facebook.
  10. Use of HubSpot marketing and analytics tools.
Technical notes

Notes

The website is built using a modern technology stack featuring React, React Native, Ruby on Rails, and Node JS, indicating a robust and scalable infrastructure. The integration of Tiny Slider enhances UI interactivity. Marketing and analytics are managed via HubSpot and Google Tag Manager, reflecting a data-driven approach. The site demonstrates good mobile optimization and accessibility standards, contributing to a positive user experience. Performance is moderate, with potential for improvement through optimization of third-party scripts and resource loading. No CMS is detected, suggesting a custom-built solution which may require dedicated maintenance. Technical risks include the absence of security headers and incomplete domain registration data, which could impact operational security and trust.
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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