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Security report for linphone.org

Belledonne Communications SARL · Telecommunications · France

Medium risk. 7 critical or high findings in Security headers, GDPR outside view and 2 other checks.

Security score

52/100

Risk levelMedium

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

Belledonne Communications SARL operates the Linphone website, providing open source and proprietary VoIP and real-time communication software solutions. The company targets developers, enterprises, and individual users with a modular suite including softphones, SDKs, and SIP servers. The website is professionally designed, well-structured, and offers comprehensive resources and community engagement. Technically, it leverages WordPress with modern plugins and analytics tools, ensuring good performance and SEO. Security posture is solid with HTTPS, reCAPTCHA, and cookie consent, though explicit security headers and a public security policy could enhance trust. WHOIS data is unavailable, slightly reducing domain trust but the site content and references support legitimacy.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 100 · Medium
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

7 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. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • 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

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

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

Keep watching linphone.org

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

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  • 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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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
75
Security headers
15
Email security
75
DNS health
75
Network security
20
GDPR outside view
53
Average
52

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

Linphone is positioned as a niche player in the telecommunications software market, emphasizing open standards and security. Its business model combines open source licensing with proprietary options and support services. The company maintains partnerships with major industry players like Thales and Orange, enhancing credibility. The website supports multiple audiences including developers and end-users, with extensive documentation and community resources. Growth potential is supported by modular product offerings and custom development services.

Security posture

The website demonstrates a mature security posture with HTTPS enforcement, anti-bot measures via Google reCAPTCHA, and cookie consent management. No exposed sensitive data or vulnerable libraries were detected. However, the absence of explicit security headers and a public incident response policy are gaps. No vulnerability disclosure or security.txt files were found. Overall, the site is secure but could improve transparency and incident readiness.

Recommendations

  1. Add explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  2. Publish a public security policy and incident response contact information.
  3. Implement and publish a security.txt file to facilitate vulnerability disclosures.
  4. Regularly audit third-party scripts and plugins for security vulnerabilities.
  5. Enhance HTTPS configuration with modern TLS protocols and certificate transparency.

Contact details published on the site

Addresses
Legal name
Belledonne Communications SARL
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Belledonne Communications SARL
Description
Entreprise open source française spécialisée dans les communications en temps réel, éditrice de la suite logicielle Linphone incluant softphone, SDK VoIP, et serveur SIP.
Key services
Softphone Linphone, Liblinphone SDK, Flexisip SIP server, Custom development and support services
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress 6.8.2, Yoast SEO plugin, Matomo analytics, Google reCAPTCHA, jQuery, SVG Support plugin, Monarch plugin, SitePress Multilingual CMS (WPML), Phosphor Icons, Tarteaucitron cookie consent
Frameworks
WordPress
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • Use of HTTPS
  • Google reCAPTCHA for forms
  • Cookie consent management via tarteaucitron.js
  • No exposed sensitive data in HTML
  • No vulnerable libraries detected in scripts

Analytics and tracking

Services
Matomo
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Matomo
Marketing tools
Matomo analytics, Google reCAPTCHA
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content in French language
  2. Strong focus on open source VoIP and real-time communication software
  3. Comprehensive navigation menus and resources for different user groups
  4. Use of modern web technologies and analytics tools
  5. Presence of privacy and cookie policies with consent mechanisms
  6. No signs of malicious or adult content
  7. WHOIS data unavailable, limiting domain trust verification
  8. Good SEO and accessibility practices observed
Technical notes

Notes

The website is built on WordPress 6.8.2 with a well-maintained tech stack including Yoast SEO, Matomo analytics, and multilingual support via WPML. It uses modern JavaScript libraries and icon sets, ensuring a rich user experience. Performance is moderate with good mobile optimization and accessibility features. The site employs cookie consent tools and reCAPTCHA for form security. Hosting provider details are not explicit. Overall, the technical infrastructure is robust and supports the business needs effectively.
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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