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Security report for mluvim-anglicky.cz

Mluvím Anglicky s.r.o. · Education · Czech Republic

Medium risk. 9 critical or high findings in GDPR outside view, SSL/TLS and 2 other checks.

Security score

51/100

Risk levelMedium

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

Mluvím Anglicky s.r.o. is a Czech language school specializing in English language education, offering tailored individual and corporate lessons both onsite across the Czech Republic and online. The company positions itself as a modern, high-quality language school with a team of experienced Czech-speaking and native English-speaking instructors. The website reflects a professional and trustworthy business with strong client testimonials and membership in the Czech Association of Language Schools. Technically, the website is well-built using modern web technologies, hosted on Netlify, and optimized for mobile and SEO. Security posture is good with HTTPS and secure form handling, though it lacks some security headers and explicit GDPR compliance mechanisms such as cookie consent. The domain registration data is consistent with the business profile, indicating legitimacy. Overall, the website presents a credible, professional educational service with room for improvement in privacy and security policy transparency.

Scanned

NIS2 and GDPR posture

GDPR outside view
10/ 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

9 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

  2. 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.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  3. 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';…

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

Keep watching mluvim-anglicky.cz

This scan found 16 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
0
Security headers
65
Email security
45
DNS health
85
Network security
100
GDPR outside view
10
Average
51

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention mluvim-anglicky.cz, from OffSeq Breach.

No leaked records found

Breach holds no records for mluvim-anglicky.cz right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

The company targets individual learners, corporate clients, and children/teenagers within the Czech Republic, focusing on personalized language education services. Their business model centers on high-quality, customized lessons and corporate training, supported by a small but professional team. The presence of multiple client references and partnerships with reputable companies indicates a solid market position and trust. Revenue streams likely include corporate contracts and private lesson fees. The company demonstrates growth potential through digital presence and client satisfaction. Partnerships with various Czech companies enhance credibility and market reach.

Security posture

The website employs HTTPS with a valid SSL certificate and secure form submission practices, indicating a baseline security maturity. However, it lacks several recommended security headers such as Content-Security-Policy and X-Frame-Options, which could improve protection against common web attacks. No incident response or security policy information is published, and no vulnerability disclosure mechanism is present. GDPR compliance is partial, with a privacy policy present but lacking explicit GDPR statements and no cookie consent mechanism. Overall, the security posture is good but could be enhanced by implementing additional headers, privacy transparency, and incident response readiness.

Recommendations

  1. Implement comprehensive security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  2. Add a clear cookie consent banner and mechanism to comply with GDPR requirements.
  3. Enhance the privacy policy to explicitly address GDPR compliance and data protection practices.
  4. Publish a security policy and incident response contact information to improve transparency and readiness.
  5. Consider adding a security.txt file or vulnerability disclosure page to encourage responsible reporting.

Contact details published on the site

Addresses
Legal name
Mluvím Anglicky s.r.o.
VAT number
CZ21663637
Registration number
21663637
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Mluvím Anglicky s.r.o.
Description
Jazyková škola poskytující individuální a firemní lekce angličtiny v ČR a online, vedená týmem zkušených českých lektorů a rodilých mluvčích s praxí a vzděláním v oboru.
Key services
Firemní výuka angličtiny, Jazykový audit a testování, Workshopy a semináře, Angličtina na teambuilding, Příměstské tábory pro firmy, Soukromé lekce angličtiny online a v officu, Příprava na jazykové zkoušky, Individuální lekce pro děti a teenagery
Content quality
excellent
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Google Tag Manager, Netlify Identity Widget, Fonts Bunny (Red Hat Mono font)
Platforms
Netlify hosting
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Secure form submission via POST
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

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 no blocking or WAF challenges.
  2. Content is professionally presented in Czech language targeting Czech market.
  3. Strong presence of client testimonials and references indicating trust.
  4. No explicit privacy or cookie consent mechanisms detected, potential GDPR compliance gap.
  5. Secure HTTPS connection and form submission implemented.
  6. No security.txt or incident response contacts found.
  7. WHOIS data supports legitimacy and consistency of the business.
Technical notes

Notes

The website is built with modern HTML5, CSS3, and JavaScript, leveraging Google Tag Manager for analytics and Netlify Identity for authentication features. It uses external fonts from Fonts Bunny and is hosted on Netlify, ensuring fast performance and good uptime. The site is mobile-optimized with responsive design and accessible navigation. SEO is well addressed with meta tags and Open Graph data. There is no detected CMS, indicating a custom or static site approach. Technical risks are minimal, but adding security headers and improving privacy compliance would reduce potential vulnerabilities and enhance 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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