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Is cloverleaf.cz a Scam? Security Check Results - ISSA CZECH s.r.o.

cloverleaf.cz Security Report Summary

cloverleaf.cz received a security score of 57 out of 100 in Guard's comprehensive security analysis, classified as "Elevated Risk". This report covers ISSA CZECH s.r.o.'s website security posture. ISSA CZECH s.r.o. operates in the Education industry in Czech Republic.

Jazyková škola Cloverleaf Ostrava is a well-established language school operating since 1993, offering a wide range of language courses including English, Cambridge exam preparation, e-learning, and specialized courses for children, youth, and corporate clients. The school positions itself as the largest language school in the Ostrava region with a strong focus on quality teaching, modern facilities, and professional staff. The website reflects a mature digital presence with clear navigation, responsive design, and comprehensive content tailored to its target audience of students and professionals seeking language education. Technically, the website employs modern web technologies including Bootstrap for responsive design, Google Analytics and Tag Manager for analytics, and Facebook Pixel for marketing. Cookie consent is implemented with express consent and granular preference management, demonstrating good privacy compliance. Hosting is managed by REG-ZONER, a reputable Czech registrar and hosting provider, consistent with the domain's WHOIS data. From a security perspective, the site enforces HTTPS and uses secure login forms. However, it lacks explicit HTTP security headers and does not provide a dedicated security policy or incident response contact, which are areas for improvement. No vulnerabilities or exposed sensitive data were detected in the HTML content. The domain's WHOIS data is consistent with the business claims, showing a long domain age and no privacy protection, supporting legitimacy. Overall, the website is professional, trustworthy, and compliant with GDPR requirements. Strategic recommendations include enhancing security headers, publishing a security policy, and providing incident response contacts to further strengthen security posture and user trust.

The security scan identified 33 findings across security headers, SSL/TLS, DNS health, email security, GDPR compliance, and NIS2 compliance analysis modules.

Technologies detected: Google Analytics, Google Tag Manager, Facebook Pixel, Seznam Retargeting, Bootstrap CSS, jQuery, CMS Designer.

About this security scan

Guard performs automated security assessments of websites by analyzing SSL/TLS certificates, HTTP security headers, DNS configuration, email authentication protocols (SPF, DKIM, DMARC), GDPR compliance indicators, NIS2 directive compliance, network exposure, and AI-powered business intelligence. Each report provides domain-specific findings, risk scores, and actionable recommendations.

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Is cloverleaf.cz Safe? Security Analysis for ISSA CZECH s.r.o.

https://cloverleaf.cz

Check if cloverleaf.cz is a scam or legitimate. Free security scan and reviews.

EducationCzech Republicmedium
Google AnalyticsGoogle Tag ManagerFacebook PixelSeznam RetargetingBootstrap CSS+2 more
Analyzed 10/18/2025Completed 12:45:45 AM5mo ago
57
Security Score
MEDIUM RISK

Above Education avg (55)

10,000+

Domains scanned

500+

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Order summary

Domaincloverleaf.cz
Access tierFull report or marketing add-on

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VisaMastercardApple PayGoogle Pay

Secure payments processed via EveryPay. Prices in EUR; Incl. 21% VAT.

SEQ SIA

Lastadijas 12 k-3, Riga, Latvia, LV-1050

Reg. No. 40203410806 • VAT LV40203410806

Support: guard@offseq.com+371 2256 5353

AI Summary

Jazyková škola Cloverleaf Ostrava is a well-established language school operating since 1993, offering a wide range of language courses including English, Cambridge exam preparation, e-learning, and specialized courses for children, youth, and corporate clients. The school positions itself as the largest language school in the Ostrava region with a strong focus on quality teaching, modern facilities, and professional staff. The website reflects a mature digital presence with clear navigation, responsive design, and comprehensive content tailored to its target audience of students and professionals seeking language education. Technically, the website employs modern web technologies including Bootstrap for responsive design, Google Analytics and Tag Manager for analytics, and Facebook Pixel for marketing. Cookie consent is implemented with express consent and granular preference management, demonstrating good privacy compliance. Hosting is managed by REG-ZONER, a reputable Czech registrar and hosting provider, consistent with the domain's WHOIS data. From a security perspective, the site enforces HTTPS and uses secure login forms. However, it lacks explicit HTTP security headers and does not provide a dedicated security policy or incident response contact, which are areas for improvement. No vulnerabilities or exposed sensitive data were detected in the HTML content. The domain's WHOIS data is consistent with the business claims, showing a long domain age and no privacy protection, supporting legitimacy. Overall, the website is professional, trustworthy, and compliant with GDPR requirements. Strategic recommendations include enhancing security headers, publishing a security policy, and providing incident response contacts to further strengthen security posture and user trust.

Detected Technologies

Google AnalyticsGoogle Tag ManagerFacebook PixelSeznam RetargetingBootstrap CSSjQueryCMS Designer

12 urgent findings need attention

1 critical · 11 high

  • + 4 more findings in the full report below
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Guard tracks your live infrastructure daily: certificate expiry, DNS & mail authentication drift, uptime changes, subdomain inventory, and unexpected tracker or content shifts. A full timeline captures every diff so you can prove remediation and spot regressions instantly.

Security drift alerts

Risk score drops, new high-severity issues, and header hardening gaps

Compliance watch

GDPR / NIS2 posture changes with governance evidence snapshots

Infrastructure surface

Unexpected open services, SSL expiry, DNS & email authentication changes

Content & tracker intelligence

Marketing tech shifts, analytics drift, and AI recommendation updates

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Security Headers

6 findings

35/100

GDPR Compliance

3 findings

40/100

NIS2 Compliance

9 findings

2/100

Email Security

5 findings

60/100

🧠AI Business Intelligence

Technology stack, business insights, and market analysis powered by AI.

Business Intelligence

Market & Strategic Analysis

Cloverleaf operates in the education sector, specifically language education, with a strong regional presence in Ostrava, Czech Republic. The company leverages a diversified business model offering public language courses, Cambridge exam preparation, e-learning, corporate training, and translation services. Its competitive advantage lies in its long-standing market presence, comprehensive course offerings, and membership in the Asociace jazykových škol, which enhances credibility. Revenue streams likely include course fees, exam fees, and supplementary services such as translation and audits. The target customer segments include students, working professionals, companies, and educators. The partnership ecosystem includes ISSA CZECH s.r.o. (developer/publisher), Cloverbooks e-shop, and industry associations. The company shows indicators of stable growth and digital maturity through its integrated marketing and analytics tools.

Extracted Contact Information

Marketing Intelligence Data

Security Posture Analysis

Comprehensive Security Assessment

The website demonstrates a moderate to strong security posture with enforced HTTPS, secure login forms, and a robust cookie consent mechanism aligned with GDPR. The use of multiple tracking and advertising scripts is managed with user consent, reflecting privacy awareness. However, the absence of HTTP security headers such as Content Security Policy, HSTS, and X-Frame-Options reduces defense-in-depth. No incident response or security policy information is publicly available, which may hinder rapid response to security events. No vulnerabilities or sensitive data leaks were detected in the analyzed content. Overall, the security maturity is good but can be improved by implementing recommended headers and publishing security policies.

Strategic Recommendations

Priority Actions for Security Improvement

1

Implement HTTP security headers including Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), X-Frame-Options, and X-Content-Type-Options to enhance protection against common web attacks.

Observations

AI-powered comprehensive website and business analysis.

AI-Enhanced Website Analysis

Business Insights

Company:

ISSA CZECH s.r.o.

Description:

Jazyková škola Cloverleaf Ostrava je největší jazyková škola v regionu s tradicí od roku 1993. Nabízí široký výběr jazykových kurzů, včetně angličtiny, přípravy na Cambridge zkoušky, e-learningu, kurzů pro děti, mládež i firmy. Disponuje kvalitním lektorským týmem, moderním technickým zázemím a profesionálním personálem. Poskytuje služby i mimo Ostravu, např. v Opavě a Frýdku-Místku.

Key Services:
jazykové kurzy pro veřejnostCambridge zkouškye-learningkurzy pro děti a mládežfiremní výukapřeklady a tlumočeníjazykový audit
Content Quality:

good

Branding:

consistent

Technical Stack

Technologies:
Google AnalyticsGoogle Tag ManagerFacebook PixelSeznam RetargetingBootstrap CSSjQueryCMS Designer
Frameworks:
Bootstrap
Performance:

moderate

Mobile:

good

Accessibility:

basic

SEO:

good

Security Assessment

Security Score:
85/100
Best Practices:
  • HTTPS enforced
  • Cookie consent with granular control
  • No exposed sensitive data in HTML
  • Secure login form with password field

Analytics & Tracking

Services:
Google AnalyticsGoogle Ads Conversion Tracking
Tracking Level:moderate
Privacy Compliance:good

Advertising & Marketing

Ad Networks:
Google AdsSeznam Retargeting
Tracking Pixels:
Facebook Pixel
Transparency Level:good

Website Quality Assessment

Design Quality:good
User Experience:good
Content Relevance:good
Navigation Clarity:good
Professionalism:good
Trustworthiness:high

Key Observations

1

Website is fully accessible with no blocking or WAF challenges.

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🛡️Security Headers

HTTP security headers analysis and recommendations.

Security Headers

HTTP security headers analysis

35/100
Score

Missing Strict-Transport-Security header

HIGH

Forces HTTPS connections

Missing X-Content-Type-Options header

MEDIUM

Prevents MIME type sniffing

Missing Content-Security-Policy header

HIGH

Controls resources the browser is allowed to load

Missing X-XSS-Protection header

MEDIUM

Legacy XSS protection (deprecated but still recommended)

Missing Referrer-Policy header

LOW

Controls referrer information sent with requests

Missing Permissions-Policy header

MEDIUM

Controls browser features and APIs

👤GDPR Compliance

Privacy and data protection assessment under GDPR regulations.

GDPR Compliance

Privacy and data protection assessment

40/100
Score

No Privacy Policy found

HIGH

GDPR requires a clear and accessible privacy policy

EU business without adequate privacy measures

CRITICAL

EU businesses are subject to strict GDPR requirements

Third-party services without privacy policy

HIGH

Detected services: Google Analytics, Facebook, Twitter, LinkedIn, YouTube

GDPR Compliance Analysis

Privacy Policy0% confidence
Cookie Policy85% confidence
Contact Information Found90% confidence
emailphone

🛡️NIS2 Compliance

Network & Information Security Directive compliance assessment.

NIS2 Compliance

Network & Information Security Directive

2/100
Score

No information security framework found

HIGH

NIS2 requires documented cybersecurity and information security measures

No vulnerability disclosure policy

MEDIUM

NIS2 encourages coordinated vulnerability disclosure

No security policy documentation found

HIGH

NIS2 requires documented cybersecurity governance and risk management

No incident response procedures found

HIGH

NIS2 requires documented incident response and business continuity plans

No business continuity planning found

MEDIUM

NIS2 emphasizes operational resilience and business continuity

No security contact information

HIGH

NIS2 requires clear incident reporting channels

No vulnerability reporting mechanism

MEDIUM

Clear vulnerability reporting supports coordinated disclosure

No NIS2 reference found

LOW

Consider explicitly mentioning NIS2 compliance efforts

Critical sector without clear security compliance

HIGH

Detected sectors: transport, banking, digital

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📧Email Security

SPF, DKIM, and DMARC validation and email security assessment.

Email Security

SPF, DKIM, and DMARC validation

60/100
Score

DMARC not enforcing

MEDIUM

DMARC policy is set to "none"

No DKIM record found

MEDIUM

DKIM adds cryptographic signatures to emails

No BIMI Record

LOW

BIMI displays brand logos in email clients

No MTA-STS Policy

MEDIUM

MTA-STS enforces TLS for email delivery

No TLS-RPT Record

LOW

TLS-RPT provides reporting for email TLS issues

SPF
Sender Policy Framework
DKIM
DomainKeys Identified Mail
DMARC
Domain-based Message Authentication
MX Records
Mail Exchange Records
BIMI
Brand Indicators
MTA-STS
Mail Transfer Agent Security
TLS-RPT
TLS Reporting
DNSSEC
DNS Security
SPF Details
Record:
v=spf1 a mx include:sparkpostmail.com ip4:81.91.222.4 ?all
DMARC Details
Policy:none
Aggregate Reports:cbe60epln7@dmarc-reports.ecomailapp.com

🏆SSL/TLS Security

Certificate validity and encryption analysis.

SSL/TLS Security

Certificate validity and encryption analysis

67/100
Score

Weak Protocols Supported

HIGH

Server supports weak protocols: TLSv1.1

OCSP Stapling Not Enabled

LOW

OCSP stapling improves performance and privacy

Certificate Transparency Not Implemented

LOW

Certificate is not logged in Certificate Transparency logs

Mixed Content Detected

MEDIUM

2 resources loaded over insecure HTTP

Partial SSL/TLS Assessment

LOW

Completed 3 of 4 security checks due to time constraints

Protocol Support

TLSv1.3TLSv1.2TLSv1.1

OCSP Status

OCSP Stapling Disabled

📊DNS Health

DNS configuration and security assessment.

DNS Health

DNS configuration and security assessment

65/100
Score

DNSSEC Not Enabled

MEDIUM

DNSSEC is not configured for this domain

CAA Records Not Configured

LOW

Certificate Authority Authorization (CAA) records not found

Weak SPF Policy

HIGH

SPF record has permissive policy allowing any server to send email

DMARC Policy Set to None

LOW

DMARC is configured but not enforcing any policy

DNS Records

A Records:81.91.222.51
Name Servers:
ns1.regzone.czDNS only
ns1.regzone.deDNS only
ns1.regzone.infoDNS only
MX Records:
10: 138ca019c475b4e6.mx1.emailprofi.seznam.cz
10: 138ca019c475b4e6.mx2.emailprofi.seznam.cz

DNSSEC Status

DNSSEC Not Enabled

SPF Analysis

SPF Record:
v=spf1 a mx include:sparkpostmail.com ip4:81.91.222.4 ?all

Network Security

Port scanning and network exposure analysis.

Network Security

Port scanning and network exposure analysis

100/100
Score

Good Network Security Posture

LOW

No unnecessary services detected on common risky ports

How does cloverleaf.cz compare?

See how cloverleaf.cz stacks up against similar websites in the same industry.

🔧Technical Analysis

Detailed technical findings and analysis from AI assessment.

Technical Analysis

Comprehensive security assessment findings

Additional Findings

The website is built on a CMS Designer platform with Bootstrap framework for responsive design. It uses modern analytics and marketing tools including Google Analytics, Google Tag Manager, Facebook Pixel, and Seznam Retargeting. The site is hosted by REG-ZONER, a reputable Czech hosting provider. Performance is moderate with good mobile optimization and basic accessibility features. SEO is supported by proper meta tags and structured navigation. The site uses multiple external scripts loaded asynchronously to optimize load times. There is room for technical improvement by adding security headers and enhancing accessibility compliance. Overall, the technical infrastructure supports the business needs effectively with opportunities for modernization.
Professional PDF & Marketing Data

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PDF Report & Export

PDF download, email delivery, unlock code

39.90 €one-time • Incl. 21% VAT

Marketing Intelligence

Contact emails, phone numbers & warm leads

49.90 €one-time • Incl. 21% VAT

Plan Comparison

FeaturePDF ReportMarketing+
Full security analysis
Professional PDF export
Email delivery
Lifetime access + unlock code
Contact emails & phones
Marketing outreach data

Already purchased?

Order summary

Domaincloverleaf.cz
Access tierFull report or marketing add-on

Digital reports are delivered immediately after payment. By continuing you acknowledge the withdrawal waiver described in our Returns & Refunds policy.

VisaMastercardApple PayGoogle Pay

Secure payments processed via EveryPay. Prices in EUR; Incl. 21% VAT.

SEQ SIA

Lastadijas 12 k-3, Riga, Latvia, LV-1050

Reg. No. 40203410806 • VAT LV40203410806

Support: guard@offseq.com+371 2256 5353

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