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Security report for sl-one.cz

SL One s.r.o. · Other · Czech Republic

Medium risk. 8 critical or high findings in GDPR outside view, Security headers and 2 other checks.

Security score

68/100

Risk levelMedium

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

SL One s.r.o. operates as an investment special purpose vehicle (SPV) founded by colleagues from the legal firm SEDLAKOVA LEGAL. The company provides a unique employee benefit allowing its staff to invest alongside each other in promising startups, sharing both risks and profits. The business model focuses on supporting startups with capital and legal backing, targeting employees of the parent legal firm and innovative startups seeking investment. The website is professionally designed, well-structured, and optimized for mobile devices, reflecting a small but focused enterprise in the Czech Republic. Technically, the website leverages modern JavaScript frameworks, Google Tag Manager, Google Analytics, and Facebook Pixel for marketing and analytics purposes. It is built on the Solidpixels CMS platform and employs HTTPS with good SSL configuration. However, explicit security headers such as CSP and HSTS are not detected, indicating room for improvement in security hardening. Privacy and cookie policies are present and GDPR compliant, with a functional cookie consent mechanism. From a security perspective, the site demonstrates a moderate security posture with secure forms and no visible vulnerabilities. The absence of WHOIS data limits domain legitimacy verification, which slightly impacts trust scores. No direct contact emails or phone numbers are published, with communication facilitated solely through a contact form. No social media presence is linked from the site. Overall, SL One presents a credible and professional investment vehicle with a niche market focus. Enhancing domain transparency and security headers would strengthen trust and security posture. The site is safe for general audiences with no adult or questionable content detected.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
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. GDPR outside view

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

    • Critical

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • 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

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Google APIs

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

  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 X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

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

Keep watching sl-one.cz

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.

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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
52
Security headers
80
Email security
65
DNS health
85
Network security
100
GDPR outside view
25
Average
68

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

SL One is positioned as a niche investment SPV closely tied to a legal practice, offering employees a unique opportunity to co-invest in startups. This model leverages the legal expertise and capital of its members to support innovative ventures. The company targets a specialized audience of legal professionals and startups, differentiating itself from traditional investment funds by emphasizing shared risk and legal support. The business model likely generates revenue through investment returns and possibly management fees. The website content and structure suggest a small-sized enterprise with a focused operational scope. The absence of public contact details and social media presence indicates a controlled communication strategy, possibly to maintain exclusivity and privacy. The use of modern marketing tools and analytics reflects a digitally mature approach to audience engagement.

Security posture

The website employs HTTPS with a valid SSL certificate, ensuring encrypted communications. It uses cookie consent mechanisms aligned with GDPR requirements, indicating awareness of privacy regulations. However, the lack of explicit security headers such as Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Frame-Options reduces the overall security hardening. No vulnerabilities or exposed sensitive data were detected in the analysis. The contact form includes input validation and anti-spam measures, enhancing security for user submissions. The absence of a published security policy, incident response plan, or vulnerability disclosure program suggests limited formal security governance. Overall, the security posture is moderate but could be improved by implementing additional HTTP security headers and publishing security-related policies.

Recommendations

  1. Implement and enforce HTTP security headers including CSP, HSTS, and X-Frame-Options to enhance protection against common web attacks.
  2. Publish a clear security policy and incident response plan on the website to improve transparency and preparedness.
  3. Establish a vulnerability disclosure program or security.txt file to encourage responsible reporting of security issues.
  4. Enhance domain registration transparency by ensuring WHOIS data is complete and publicly available to improve trustworthiness.
  5. Consider adding direct contact information such as company email or phone number to facilitate communication and increase business credibility.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
SL One s.r.o.
Description
SL One is an investment SPV founded by colleagues from SEDLAKOVA LEGAL. It offers a unique employee benefit and a way to jointly support successful startups. The company enables its employees to invest alongside colleagues, sharing risks and profits in startups.
Key services
Employee investment benefit, Startup investments, Legal and capital support for startups
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Google Analytics, Facebook Pixel, Solidpixels CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
80/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with opt-in/out
  • Form input validation

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Ads, Facebook Ads
Tracking pixels
Facebook Pixel
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 Czech language and professionally presented.
  3. No explicit security headers detected in provided data.
  4. WHOIS data unavailable, limiting domain legitimacy verification.
  5. Privacy and cookie policies are present and GDPR compliant.
  6. Contact available only via form; no direct emails or phone numbers found.
  7. No social media links detected on the site.
  8. Site uses modern JavaScript libraries and Google/Facebook tracking pixels.
Technical notes

Notes

The website is built on the Solidpixels CMS platform and uses modern JavaScript libraries and frameworks. It integrates Google Tag Manager, Google Analytics, and Facebook Pixel for marketing and analytics purposes. The site is mobile optimized with responsive design and good SEO practices including meta tags and Open Graph data. Performance is moderate with asynchronous loading of scripts and lazy loading of images. Accessibility features are basic but present. No major technical debt or deprecated technologies were detected. Hosting provider details are not disclosed. Overall, the technical infrastructure supports a professional and functional web presence with opportunities for security and performance enhancements.
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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