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Security report for previo.cz

PREVIO s.r.o. · Hospitality · Czech Republic

Medium risk. 5 critical or high findings in Security headers, Email security and 1 other check.

Security score

70/100

Risk levelMedium

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

PREVIO s.r.o. operates a Czech-language online hotel reservation and reception system targeting hospitality businesses such as hotels, pensions, and campsites. The company offers a SaaS platform that facilitates reservation management, document printing, and statistical reporting, positioning itself as a key player in the Czech hospitality software market. The website is professionally designed, well-structured, and optimized for desktop and mobile users, reflecting a mature digital presence. Technically, the site employs modern analytics and tracking tools including Google Analytics, Facebook Pixel, Microsoft Clarity, and Smartlook, all managed with a GDPR-compliant cookie consent mechanism. Security posture is strong with HTTPS enforced, security headers present, and reCAPTCHA protecting forms, though the absence of a public security policy and incident response contacts suggests room for improvement. Overall, the website is trustworthy and business credible, though the lack of WHOIS transparency slightly reduces domain trust. Strategic recommendations include publishing security policies, vulnerability disclosure, and incident response information to enhance trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
100/ 100 · Low
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 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 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. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

  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 Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

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

Keep watching previo.cz

This scan found 23 issues across 5 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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Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
15
Email security
60
DNS health
80
Network security
100
GDPR outside view
100
Average
70

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

PREVIO s.r.o. is a medium-sized Czech company founded in 2002, specializing in hospitality software solutions. Its business model is SaaS-based, targeting hotel operators and similar accommodation providers. The company leverages partnerships such as with Daktela for integrated chat support. Revenue streams likely include subscription fees for software usage. The website content and metadata indicate a clear focus on the Czech market and hospitality sector. The company maintains a consistent brand presence and provides comprehensive customer support channels. The presence of privacy and cookie policies with consent mechanisms demonstrates regulatory awareness. The company appears well-positioned in its niche with a professional online presence and established market reputation.

Security posture

The website demonstrates a good security maturity level with HTTPS enforced and multiple security headers implemented. Use of reCAPTCHA on forms and cookie consent mechanisms indicate attention to user data protection and bot mitigation. However, the absence of a published security policy, incident response contacts, and vulnerability disclosure reduces transparency and preparedness perception. No exposed sensitive data or vulnerable libraries were detected in the HTML content. The site uses reputable third-party analytics and tracking services with consent management, aligning with GDPR requirements. Overall, the security posture is solid but could be enhanced by publishing formal security documentation and incident response procedures.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and controls.
  2. Implement and publicize a vulnerability disclosure program or security.txt file.
  3. Provide clear incident response contact information for security issues.
  4. Pursue recognized security certifications such as ISO 27001 to boost trust.
  5. Enhance website accessibility compliance to improve user inclusivity.

Contact details published on the site

Addresses
Legal name
PREVIO s.r.o.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
PREVIO s.r.o.
Description
Hotelový rezervační a recepční systém Previo je internetová aplikace, určená provozovatelům ubytovacích zařízení hotelového typu (hotel, penzion, apartmány, kemp, motel, botel, chaty a chalupy). Nabízí přehlednou správu rezervací a umožňuje tisk dokumentů jako jsou faktury, ubytovací kniha hostů, statistické reporty, atd.
Key services
hotel reservation management, reception system, document printing (invoices, guest books), statistical reporting
Content quality
good
Branding
consistent

Technology

Stack
Google Tag Manager, Google Analytics, Facebook Pixel, Microsoft Clarity, Smartlook, Cookiebot, intl-tel-input, reCAPTCHA
Platforms
web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • reCAPTCHA for forms
  • Cookie consent with blocking mode
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics, Microsoft Clarity, Smartlook
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Ads
Tracking pixels
Facebook Pixel, Microsoft Clarity, Smartlook
Marketing tools
Cookiebot
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenge.
  2. WHOIS data is unavailable, indicating privacy protection or registration issues.
  3. Strong presence of privacy and cookie policies with consent mechanisms.
  4. Multiple analytics and tracking tools used with consent management.
  5. No explicit security policy or incident response information published.
  6. Business is focused on hospitality software solutions in Czech Republic.
  7. Website uses modern tracking and analytics technologies.
  8. No suspicious or malicious content detected.
  9. Contact information is clearly provided including phone, email, and forms.
  10. Good SEO and metadata usage with Open Graph tags.
Technical notes

Notes

The website uses a modern technology stack including Google Tag Manager, Google Analytics, Facebook Pixel, Microsoft Clarity, Smartlook, and Cookiebot for analytics and consent management. It employs reCAPTCHA for form security and intl-tel-input for phone number input formatting. The site is responsive and optimized for mobile devices with good SEO practices including meta tags and Open Graph data. Performance is moderate with asynchronous loading of scripts. No CMS was explicitly detected, suggesting a custom or proprietary platform. Hosting provider details are not disclosed. Technical risks are low, but the site could benefit from improved accessibility features and formal security documentation to reduce technical debt and enhance compliance.
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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