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Security report for resmaster.eu

ResMaster systems Ltd. · Hospitality · Czech Republic

High risk. 10 critical or high findings in GDPR outside view, Security headers and 3 other checks.

Security score

45/100

Risk levelHigh

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

ResMaster systems Ltd. operates a specialized online hotel booking engine and related services tailored for hotel managers and hospitality businesses. The company offers a comprehensive suite of services including booking engines, responsive websites, channel management, loyalty programs, payment gateways, and SEO marketing tools. With over 200,000 bookings since 2005, ResMaster positions itself as a niche player focused on efficient and user-friendly hotel reservation solutions. The website is professionally designed, mobile-optimized, and provides clear navigation and business information, targeting primarily small to medium-sized hospitality businesses in the Czech Republic and surrounding regions. Technically, the website leverages modern web technologies such as Bootstrap, jQuery, Google Maps API, and Google Tag Manager. It employs HTTPS with a good SSL configuration and integrates security features like Google reCAPTCHA and a cookie consent mechanism compliant with GDPR. The technical infrastructure supports moderate performance and good SEO practices, although some improvements in accessibility and security headers could enhance the overall posture. From a security perspective, the site demonstrates a solid baseline with HTTPS enforcement and anti-bot protections. However, the absence of explicit security policies, incident response contacts, and vulnerability disclosure mechanisms indicates room for maturity in security governance. The WHOIS data is privacy protected, which is common for small businesses, but limits domain registration transparency. No critical vulnerabilities or suspicious patterns were detected in the content or technical setup. Overall, ResMaster presents a trustworthy and professional online presence with a strong focus on hospitality booking solutions. Strategic enhancements in security policy transparency and technical security headers would further strengthen its risk posture and trustworthiness.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 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

10 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

  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 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';…

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

Keep watching resmaster.eu

This scan found 25 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

Email alerts on material changes and an exportable JSON history of every change.

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Full report

€39.90one-time

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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
72
Security headers
20
Email security
70
DNS health
60
Network security
20
GDPR outside view
25
Average
45

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

ResMaster operates in the hospitality sector providing SaaS solutions for hotel booking and management. Its competitive advantage lies in a user-friendly system developed by hotel managers themselves, ensuring alignment with industry needs. The business model is subscription and service-based, offering both free LITE and full versions, targeting small to medium hotel operators. The company leverages partnerships for marketing and technology integrations, including Google and Mailchimp. Growth indicators include a long operational history since 2005 and a substantial booking volume. The company maintains a focused ecosystem with no detected subsidiaries or parent companies. Its market presence is regional with a professional website and clear contact information, supporting credibility and customer engagement.

Security posture

The website exhibits a moderate to good security maturity level with HTTPS enforced and Google reCAPTCHA protecting user input forms. Cookie consent and privacy policies indicate GDPR awareness and compliance. However, the lack of security headers such as Content-Security-Policy and absence of published incident response or vulnerability disclosure policies suggest gaps in security governance. No exposed sensitive data or vulnerable libraries were detected, but the use of older jQuery versions could pose risks if not regularly updated. The site lacks explicit security contact channels, which could delay incident reporting and response. Overall, the security posture is adequate for the business size but could benefit from formalized policies and technical hardening.

Recommendations

  1. Implement and enforce security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to mitigate common web attacks.
  2. Publish a clear security policy and incident response plan on the website to improve transparency and readiness.
  3. Update all JavaScript libraries, especially jQuery, to the latest stable versions to reduce vulnerability exposure.
  4. Enhance accessibility features for forms and navigation to improve usability and compliance with standards.
  5. Establish a vulnerability disclosure program or security.txt file to encourage responsible reporting and improve security culture.

Contact details published on the site

Addresses
Legal name
Resmaster Systems s.r.o
Registration number
91836
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
ResMaster systems Ltd.
Description
ResMaster is a web booking engine developed by hotel managers for hotel managers, offering efficient, fast, and easy-to-use reservation systems and related services for hotels and hospitality businesses.
Key services
Booking engine, Responsive website, Distribution & Channel Management, Loyalty program, Multiple properties management, Whitelabel solutions, Payment gateway, SEO & Marketing
Content quality
good
Branding
consistent

Technology

Stack
Bootstrap 4.0.0, jQuery 1.11.2 and 3.3.1, Google Maps API, Google reCAPTCHA v2, Google Tag Manager, bxSlider, Popper.js
Frameworks
Bootstrap
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Google reCAPTCHA on contact form
  • Cookie consent banner with granular controls

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Google Ads, Sklik
Tracking pixels
Facebook pixel
Marketing tools
Mailchimp (integration mentioned)
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 or privacy protected, limiting domain registration insights.
  3. Comprehensive privacy and cookie policies are present with GDPR compliance.
  4. Contact information is complete and includes a physical address in Prague, Czech Republic.
  5. Website uses modern technologies and includes security best practices like HTTPS and reCAPTCHA.
  6. No security policy or incident response information is provided.
  7. No terms of service page detected.
  8. Marketing and analytics tools are used with user consent mechanisms.
  9. Content is business-focused and safe for general audiences.
Technical notes

Notes

The website is built on a modern tech stack including Bootstrap 4, jQuery, Google Maps API, and Google Tag Manager, supporting responsive design and interactive features. Performance is moderate with room for optimization, particularly in script loading and caching strategies. The site uses HTTPS with a valid SSL certificate ensuring encrypted communications. Cookie consent and GDPR compliance are well implemented. However, the absence of a CMS or clear hosting provider information limits insights into backend infrastructure. The use of multiple jQuery versions may indicate technical debt. Overall, the technical implementation supports business needs but could be improved with updated libraries, enhanced security headers, and performance tuning.
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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