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Security report for hello.cz

Jazyková škola Hello · Education · Czech Republic

Medium risk. 8 critical or high findings in GDPR outside view, Security headers and 1 other check.

Security score

64/100

Risk levelMedium

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

Jazyková škola Hello is an established Czech language school operating since 1996, offering a wide range of language courses, exam preparation, and related educational services. It holds accreditations from reputable institutions such as Cambridge ESOL and Goethe Institut, positioning itself as a trusted provider in the education sector with branches in Ostrava, Brno, and Opava. The website reflects a medium-sized educational business targeting students, children, adults, companies, and seniors with diverse language learning needs. Technically, the website is built on ASP.NET Web Forms with legacy jQuery 1.6.1 and custom JavaScript. It uses HTTPS and includes standard web forms with proper hidden fields for state management. However, it lacks modern security headers and uses an outdated JavaScript library, which could pose security risks. The site has moderate performance and basic mobile optimization, with good SEO practices evident in meta tags and structured navigation. From a security perspective, the site benefits from HTTPS but lacks explicit privacy and cookie policies, consent mechanisms, and security.txt or vulnerability disclosure information. The absence of WHOIS data reduces domain trustworthiness, although the business presence and partner affiliations support legitimacy. Tracking via Google Tag Manager and imedia.cz retargeting scripts indicates moderate user tracking without clear privacy compliance disclosures. Overall, the website is professional and trustworthy for its educational purpose but would benefit from enhanced security practices, updated technologies, and improved privacy compliance to strengthen its risk posture and user trust.

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

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

  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 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';…

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

Keep watching hello.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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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
67
Security headers
45
Email security
82
DNS health
80
Network security
100
GDPR outside view
10
Average
64

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 hello.cz, from OffSeq Breach.

Total records
57
Employees
0
Customers
52
Third parties
5
Weak passwords
30%

4 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for hello.cz.

Select it in the checkout above.

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Open in Breach(opens in a new tab)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

Jazyková škola Hello operates in the Czech education sector, focusing on language instruction and certification preparation. Its competitive advantage lies in its accreditations with Cambridge and Goethe Institut, a broad course offering, and a multi-branch presence. The business model is service-oriented, generating revenue from course fees, exam preparation, and related educational services. Target customers include individuals of all ages and corporate clients. The company maintains partnerships with recognized certification bodies and offers additional educational institutions as subsidiaries, enhancing its ecosystem. Growth indicators include a large number of students served and diversified course formats including online options. Strategic observations suggest opportunities in digital modernization and enhanced privacy compliance to meet evolving regulatory demands.

Security posture

The website demonstrates a moderate security maturity level with HTTPS enabled and secure form handling. However, the use of an outdated jQuery version and absence of security headers such as Content-Security-Policy and X-Frame-Options expose potential vulnerabilities. There is no visible incident response or vulnerability disclosure information, and privacy compliance is minimal with no explicit cookie or privacy policies. Data protection practices are basic, with contact information available but no dedicated security or privacy contacts. The security culture appears limited to foundational measures without advanced protections or transparency. Compliance gaps with GDPR and other regulations are evident, suggesting a need for policy updates and enhanced user consent mechanisms.

Recommendations

  1. Upgrade jQuery and other JavaScript libraries to current secure versions to mitigate known vulnerabilities.
  2. Implement comprehensive privacy and cookie policies with explicit user consent mechanisms to ensure GDPR compliance.
  3. Add security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.
  4. Publish a security.txt file and establish clear vulnerability disclosure and incident response contacts to improve transparency and readiness.
  5. Conduct a full security audit and penetration test to identify and remediate any hidden vulnerabilities and improve overall security posture.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Jazyková škola Hello
Description
Akreditovaná jazyková škola. Nabízíme jazykové kurzy pro firmy a veřejnost: skupinové, individuální a intenzivní - angličtina, němčina, francouzština, španělština, ruština, italština aj. Příprava k jazykovým certifikátům pro děti i dospělé. Jazyková škola je akreditovaným centrem pro zkoušky z angličtiny Cambridge ESOL English Exams (YLE, KET, PET, FCE, CAE, CPE, BEC, ICFE, ILEC) a z němčiny Goethe Institut (Fit, SD, ZD, B2, C1). Pomaturitní studium. Překlady a tlumočení. Jazykový audit. Pobočky: Ostrava, Brno a Opava.
Key services
language courses, language exams preparation, pomaturitní studium (post-secondary study), translations and interpreting, language audit
Content quality
good
Branding
consistent

Technology

Stack
ASP.NET Web Forms, jQuery 1.6.1, custom JavaScript, CSS stylesheets
Frameworks
ASP.NET
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • HTTPS enabled
  • secure form with __VIEWSTATE and __EVENTVALIDATION hidden fields

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
imedia.cz retargeting
Marketing tools
Google Analytics (implied by GTM), imedia.cz retargeting
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 rich content
  2. No privacy or cookie policy explicitly found
  3. WHOIS data unavailable, possibly privacy protected or domain not registered properly
  4. Uses outdated jQuery version (1.6.1) which may have vulnerabilities
  5. No security headers detected in HTML content
  6. Multiple social media and partner links present
  7. Website uses HTTPS
  8. No visible forms collecting sensitive personal data except course search and login
  9. No security.txt or vulnerability disclosure information found
Technical notes

Notes

The website is built on ASP.NET Web Forms technology with legacy jQuery 1.6.1 and custom JavaScript. It uses standard CSS for styling and includes responsive elements but with basic mobile optimization. The site loads moderately fast but could benefit from modernization of its tech stack and improved accessibility features. SEO is well addressed with meta tags and structured navigation. Hosting provider details are not disclosed. The site uses HTTPS but lacks modern security headers. The technical debt includes outdated libraries and missing security best practices, which could impact business operations if exploited. Opportunities exist for upgrading frameworks, improving performance, and enhancing security configurations.
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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