Is cloverleaf.cz Safe? Security Analysis for ISSA CZECH s.r.o.
https://cloverleaf.czCheck if cloverleaf.cz is a scam or legitimate. Free security scan and reviews.
Above Education avg (55)

10,000+
Domains scanned
500+
Security teams trust us
EveryPay
Secure checkout
Instant
Reports delivered
Get the professional PDF report for cloverleaf.cz
Export this security analysis as a professional PDF document, receive it via email, and access marketing intelligence data including contact emails and phone numbers. One-time purchase for lifetime access.
PDF Report & Export
PDF download, email delivery, unlock code
Marketing Intelligence
Contact emails, phone numbers & warm leads
Plan Comparison
| Feature | PDF Report | Marketing+ |
|---|---|---|
| Full security analysis | ||
| Professional PDF export | ||
| Email delivery | ||
| Lifetime access + unlock code | ||
| Contact emails & phones | — | |
| Marketing outreach data | — |
Already purchased?
Order summary
Digital reports are delivered immediately after payment. By continuing you acknowledge the withdrawal waiver described in our Returns & Refunds policy.
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
12 urgent findings need attention
1 critical · 11 high
- + 4 more findings in the full report below
Keep cloverleaf.cz under constant watch
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
Cancel anytime. Alerts sent to the contacts you choose. Unlock the full report to view historical timelines and alerts.
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
Physical Addresses (1)
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
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
ISSA CZECH s.r.o.
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.
good
consistent
Technical Stack
moderate
good
basic
good
Security Assessment
- HTTPS enforced
- Cookie consent with granular control
- No exposed sensitive data in HTML
- Secure login form with password field
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is fully accessible with no blocking or WAF challenges.
Get this report delivered to your inbox
Receive a summary of the cloverleaf.cz security findings by email. Quick and easy to share with decision makers.
🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Missing Strict-Transport-Security header
HIGHForces HTTPS connections
Missing X-Content-Type-Options header
MEDIUMPrevents MIME type sniffing
Missing Content-Security-Policy header
HIGHControls resources the browser is allowed to load
Missing X-XSS-Protection header
MEDIUMLegacy XSS protection (deprecated but still recommended)
Missing Referrer-Policy header
LOWControls referrer information sent with requests
Missing Permissions-Policy header
MEDIUMControls browser features and APIs
👤GDPR Compliance
Privacy and data protection assessment under GDPR regulations.
GDPR Compliance
Privacy and data protection assessment
No Privacy Policy found
HIGHGDPR requires a clear and accessible privacy policy
EU business without adequate privacy measures
CRITICALEU businesses are subject to strict GDPR requirements
Third-party services without privacy policy
HIGHDetected services: Google Analytics, Facebook, Twitter, LinkedIn, YouTube
GDPR Compliance Analysis
🛡️NIS2 Compliance
Network & Information Security Directive compliance assessment.
NIS2 Compliance
Network & Information Security Directive
No information security framework found
HIGHNIS2 requires documented cybersecurity and information security measures
No vulnerability disclosure policy
MEDIUMNIS2 encourages coordinated vulnerability disclosure
No security policy documentation found
HIGHNIS2 requires documented cybersecurity governance and risk management
No incident response procedures found
HIGHNIS2 requires documented incident response and business continuity plans
No business continuity planning found
MEDIUMNIS2 emphasizes operational resilience and business continuity
No security contact information
HIGHNIS2 requires clear incident reporting channels
No vulnerability reporting mechanism
MEDIUMClear vulnerability reporting supports coordinated disclosure
No NIS2 reference found
LOWConsider explicitly mentioning NIS2 compliance efforts
Critical sector without clear security compliance
HIGHDetected sectors: transport, banking, digital
Need this report as a PDF?
Download the complete cloverleaf.cz security analysis as a professional PDF. Share it with your team, clients, or stakeholders.
📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
DMARC not enforcing
MEDIUMDMARC policy is set to "none"
No DKIM record found
MEDIUMDKIM adds cryptographic signatures to emails
No BIMI Record
LOWBIMI displays brand logos in email clients
No MTA-STS Policy
MEDIUMMTA-STS enforces TLS for email delivery
No TLS-RPT Record
LOWTLS-RPT provides reporting for email TLS issues
SPF Details
DMARC Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
Weak Protocols Supported
HIGHServer supports weak protocols: TLSv1.1
OCSP Stapling Not Enabled
LOWOCSP stapling improves performance and privacy
Certificate Transparency Not Implemented
LOWCertificate is not logged in Certificate Transparency logs
Mixed Content Detected
MEDIUM2 resources loaded over insecure HTTP
Partial SSL/TLS Assessment
LOWCompleted 3 of 4 security checks due to time constraints
Protocol Support
OCSP Status
📊DNS Health
DNS configuration and security assessment.
DNS Health
DNS configuration and security assessment
DNSSEC Not Enabled
MEDIUMDNSSEC is not configured for this domain
CAA Records Not Configured
LOWCertificate Authority Authorization (CAA) records not found
Weak SPF Policy
HIGHSPF record has permissive policy allowing any server to send email
DMARC Policy Set to None
LOWDMARC is configured but not enforcing any policy
DNS Records
DNSSEC Status
SPF Analysis
⚡Network Security
Port scanning and network exposure analysis.
Network Security
Port scanning and network exposure analysis
Good Network Security Posture
LOWNo 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
Download the cloverleaf.cz report as PDF
Get the complete analysis in a shareable PDF format, delivered instantly to your email with lifetime access.
PDF Report & Export
PDF download, email delivery, unlock code
Marketing Intelligence
Contact emails, phone numbers & warm leads
Plan Comparison
| Feature | PDF Report | Marketing+ |
|---|---|---|
| Full security analysis | ||
| Professional PDF export | ||
| Email delivery | ||
| Lifetime access + unlock code | ||
| Contact emails & phones | — | |
| Marketing outreach data | — |
Already purchased?
Order summary
Digital reports are delivered immediately after payment. By continuing you acknowledge the withdrawal waiver described in our Returns & Refunds policy.
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
Scan your own website
Liked the cloverleaf.cz report? Run the same comprehensive security analysis on your domain — free, instant, and no sign-up required.
Or browse our directory of >10,000 scanned websites.
How did we do?
Your feedback directly shapes our roadmap. Rate the quality of this report, leave an optional comment, and let us know if you want our security specialists to follow up.
What others say about cloverleaf.cz
Share your experience to help others make informed decisions. We verify every review by email and publish it once our moderation team approves it.
Community rating
—out of 5
0 reviews published