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Security report for mesresa.fr

Mesresa · Real Estate · France

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

Security score

59/100

Risk levelMedium

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

Mesresa is a French company providing a comprehensive software solution for managing seasonal and short-term rental properties. Their platform targets property owners and managers seeking to optimize bookings, automate reservation processes, and increase rental revenue. The website is professionally designed, mobile-optimized, and integrates with major rental platforms and payment gateways, reflecting a mature digital infrastructure. However, the absence of WHOIS registration data and lack of explicit privacy and security policies slightly reduce trustworthiness. The site uses modern web technologies including Bootstrap 4 and jQuery, with Google Tag Manager for analytics. Security posture is adequate with HTTPS and secure payment integration but lacks some recommended HTTP security headers. Overall, Mesresa presents a credible business with room for improvement in transparency and security best practices.

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 mesresa.fr

This scan found 27 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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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
30
Email security
75
DNS health
65
Network security
100
GDPR outside view
10
Average
59

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

Mesresa operates in the real estate and hospitality sectors, focusing on SaaS solutions for vacation rental management. Their business model includes software subscriptions with demo and free trial options, targeting small to medium property managers in France. The company leverages partnerships with platforms like Airbnb, Booking.com, and Stripe to enhance service offerings. The website content is consistent and professional, supporting a strong market position in the niche of rental management software. Absence of detailed company registration or VAT information limits deeper business verification. The integration with e-monsite.com CMS suggests reliance on third-party hosting and platform services.

Security posture

The website enforces HTTPS and uses secure payment processing via Stripe, which are strong security indicators. However, the lack of key HTTP security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options exposes the site to potential risks like cross-site scripting and clickjacking. No published security or incident response policies were found, and no vulnerability disclosure or security.txt files are present. The absence of cookie consent mechanisms may also pose compliance risks under GDPR. Overall, the security posture is moderate but could be significantly improved by implementing standard security headers and privacy compliance features.

Recommendations

  1. Implement comprehensive HTTP security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  2. Add a visible cookie consent banner and detailed cookie policy to comply with GDPR requirements.
  3. Publish a clear security policy and incident response contact information to enhance trust and readiness.
  4. Obtain and publish WHOIS registration details or ensure domain registration data is publicly available to improve legitimacy.
  5. Regularly audit third-party scripts and integrations for vulnerabilities and update dependencies.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Mesresa
Description
Mesresa offers an all-in-one, customizable software solution for managing short-term and seasonal rental properties, targeting property owners and managers to optimize bookings and revenue.
Key services
Reservation management, Online booking engine, Calendar synchronization, Channel manager integration, Online payment processing, Client management
Content quality
good
Branding
consistent

Technology

Stack
jQuery 3.6.3, Bootstrap 4, Google Tag Manager, Google Fonts, Stripe (payment integration)
Frameworks
Bootstrap 4
Platforms
e-monsite.com CMS platform
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
70/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of secure payment gateway (Stripe)

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Google Analytics (via Google Tag Manager)
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 and no blocking mechanisms.
  2. Content is in French and targets French-speaking property managers and owners.
  3. No email addresses explicitly found in HTML content; phone contact is provided.
  4. No visible cookie consent banner or explicit cookie policy found.
  5. Website uses modern frontend technologies and integrates with major platforms like Airbnb, Booking.com, Stripe.
  6. WHOIS data is missing, which is unusual and reduces domain trust score.
  7. No explicit security or incident response policies published on site.
  8. No vulnerability disclosure or security.txt file detected.
  9. Website is hosted on e-monsite.com platform, a known French website builder.
Technical notes

Notes

The website is built on the e-monsite.com CMS platform using Bootstrap 4 and jQuery 3.6.3, ensuring responsive design and compatibility across devices. Google Tag Manager is used for analytics, indicating a moderate level of digital marketing sophistication. The site loads external fonts from Google Fonts and integrates with Stripe for payment processing. Performance is moderate with no major issues detected, but accessibility features appear basic. SEO is supported by proper meta tags and Open Graph data. The lack of advanced security headers and cookie consent mechanisms indicates some technical debt in security and privacy 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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