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Security report for 42prague.cz

42 Prague · Education · Czech Republic

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

Security score

69/100

Risk levelMedium

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

42 Prague is a tuition-free coding institute that offers innovative, peer-to-peer software engineering education as part of the global 42 Network. The website reflects a strong market position within the education and technology sectors, targeting aspiring coders worldwide with a unique, gamified, and project-based learning model. Technically, the site employs modern analytics and marketing tools, including Google Tag Manager, TikTok Pixel, and Hotjar, with a cookie consent mechanism ensuring GDPR compliance. Security posture is solid with HTTPS enforced and no visible vulnerabilities, though some security headers and policies could be improved. Overall, the site is professional, trustworthy, and well-aligned with its business goals.

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 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

      Third-party services without privacy policy

      Detected services: Google Analytics, Facebook, LinkedIn, YouTube, 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 SSL Key Length

      SSL certificate uses 384-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 42prague.cz

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
65
Security headers
35
Email security
75
DNS health
75
Network security
100
GDPR outside view
65
Average
69

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 business operates within the education and technology sectors, leveraging a global network of campuses to deliver free coding education. Its competitive advantage lies in its innovative pedagogy and community-driven learning model. Revenue streams are likely supported by partnerships and sponsorships, such as with Škoda Auto. The target audience includes individuals seeking accessible, high-quality software engineering training. Growth indicators include multiple upcoming events and a large network of campuses worldwide. The partnership ecosystem is robust, with visible collaborations and endorsements. Operationally, the business maintains a strong digital presence and transparent communication.

Security posture

The website demonstrates a mature security posture with HTTPS and cookie consent mechanisms in place. No exposed sensitive data or vulnerable libraries were detected. However, the absence of explicit security policies, incident response contacts, and vulnerability disclosure mechanisms indicates room for improvement in transparency and preparedness. Compliance with GDPR is evident through privacy and cookie policies. The security culture appears proactive but could benefit from publishing more detailed security documentation and response procedures.

Recommendations

  1. Implement and publish a comprehensive security policy and incident response plan on the website.
  2. Add a terms of service page to clarify user agreements and legal protections.
  3. Introduce a vulnerability disclosure policy or security.txt file to encourage responsible reporting.
  4. Enhance HTTP security headers such as Content Security Policy (CSP), HSTS, and X-Frame-Options.
  5. Maintain and regularly update privacy and cookie policies to reflect evolving regulations and practices.

Contact details published on the site

Addresses
Legal name
42 Prague
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
42 Prague
Description
42 Prague is a full-time, tuition-free coding institute offering revolutionary free training to become software engineers. It is part of the global 42 Network with over 50 campuses worldwide.
Key services
Coding education, Piscine intensive bootcamp, Core curriculum training, Community and peer learning
Content quality
good
Branding
consistent

Technology

Stack
Google Tag Manager, Google Analytics, TikTok Pixel, Facebook Pixel, Hotjar, Smartlook, Leaflet.js, jQuery
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent with granular options
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Hotjar, Smartlook
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Ads
Tracking pixels
TikTok Pixel, Facebook Pixel, LinkedIn Insight Tag, Hotjar, Smartlook
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed with clear navigation and good content.
  2. Strong presence of privacy and cookie policies with consent mechanisms.
  3. Part of a reputable global coding network with multiple campuses worldwide.
  4. Use of multiple analytics and marketing tools with user consent.
  5. No visible security vulnerabilities or exposed sensitive data.
  6. No explicit terms of service or security policy pages found.
  7. No incident response or vulnerability disclosure information published.
Technical notes

Notes

The website uses a modern technology stack including Google Tag Manager, analytics pixels from TikTok, Facebook, and LinkedIn, and user behavior tools like Hotjar and Smartlook. It employs Leaflet.js for interactive maps and jQuery for DOM manipulation. The site is custom-built without a detectable CMS, indicating tailored development. Performance is moderate with good mobile optimization and SEO practices. Technical risks are minimal but could be reduced by adding security headers and improving accessibility features. The infrastructure supports a professional and engaging user experience aligned with business objectives.
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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