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Security report for calderys.com

Calderys · Energy · France

Medium risk. 5 critical or high findings in GDPR outside view, SSL/TLS and 1 other check.

Security score

52/100

Risk levelMedium

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

Calderys is a globally recognized enterprise specializing in refractory products and thermal protection solutions for industries operating under high temperature conditions, primarily serving the energy and manufacturing sectors. The company offers a comprehensive range of products and services including steel casting enhancement, metallurgical fluxes, and refractory services, supported by a broad international network of offices and experts. The website reflects a mature business with a strong market position and a recent strategic alliance with HarbisonWalker International, enhancing its footprint in the refractory industry. Technically, the website is built on Drupal 10 and incorporates modern front-end libraries and tools such as Google Tag Manager and Slick Carousel. While the site is mobile-optimized and SEO-friendly with good content quality and navigation, performance metrics indicate slow loading times. Accessibility is basic but present. The hosting is provided by Vox Teneo Web Engine. From a security perspective, the site lacks a valid SSL certificate and does not support any TLS protocols, which is a critical vulnerability exposing users to risks and undermining trust. Although some security headers like Content Security Policy and X-Frame-Options are implemented, the absence of HTTPS and HSTS significantly lowers the security posture. Privacy compliance is well addressed with GDPR-compliant cookie consent mechanisms and clear privacy policies. Business credibility is high with detailed contact information, social media presence, and consistent branding. Overall, the website is professionally designed and content-rich but suffers from critical security shortcomings that must be addressed urgently to protect user data and maintain trust. Strategic recommendations include immediate SSL/TLS deployment, enabling modern security protocols, and enhancing security headers and incident response capabilities.

Scanned

NIS2 and GDPR posture

GDPR outside view
18/ 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

5 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

      No HTTPS encryption

      GDPR requires appropriate security measures for personal data

      What to do: Implement SSL/TLS certificate for HTTPS

    • 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

  2. 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.

    • Critical

      No HTTPS Encryption

      Website does not use HTTPS encryption, making all data transmission vulnerable to interception

      What to do: Implement SSL/TLS certificate and redirect all HTTP traffic to HTTPS

  3. 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

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

Keep watching calderys.com

This scan found 15 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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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
0
Security headers
55
Email security
50
DNS health
90
Network security
100
GDPR outside view
18
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

Calderys operates as an essential entity within the energy and manufacturing sectors, providing specialized refractory and thermal protection products and services. Its business model focuses on B2B relationships with industrial clients requiring high-temperature process solutions. The company leverages a global network of plants and offices, indicating a large enterprise scale. The recent acquisition by HarbisonWalker International suggests strategic growth and consolidation in the refractory market. The website content and structure support a professional image aimed at industrial customers, emphasizing innovation, sustainability, and health & safety. The presence of multiple global locations and detailed contact information reflects a well-established operational footprint. Marketing and analytics tools are used moderately to support business intelligence and customer engagement.

Security posture

The current security posture of the website is weak due to the absence of a valid SSL certificate and disabled TLS protocols, which are fundamental for secure communications. While some security headers are in place, the lack of HTTPS and HSTS exposes the site to man-in-the-middle attacks and data interception. No incident response or vulnerability disclosure information is publicly available, indicating limited transparency in security management. The cookie consent mechanism and privacy policy demonstrate compliance with GDPR, but the critical SSL/TLS issues overshadow these positives. Immediate remediation is required to secure the website and protect both the company and its users from potential cyber threats.

Recommendations

  1. Obtain and deploy a valid SSL/TLS certificate to enable HTTPS across the entire site.
  2. Enable and configure modern TLS protocols (TLS 1.2 and TLS 1.3) to ensure secure data transmission.
  3. Implement HTTP Strict Transport Security (HSTS) to enforce HTTPS usage and prevent protocol downgrade attacks.
  4. Enable OCSP stapling to improve certificate revocation checking performance and security.
  5. Develop and publish an incident response plan and vulnerability disclosure policy to enhance security transparency.
  6. Conduct regular security audits and update security headers and policies to align with best practices.
  7. Optimize website performance to improve load times and user experience.
  8. Enhance accessibility features to meet higher standards and improve usability for all users.

Contact details published on the site

Addresses
Technical notes

Notes

The website is built on Drupal 10 CMS, utilizing modern JavaScript libraries such as Slick Carousel and Parallax.js for enhanced UI/UX. Google Tag Manager and AddToAny are integrated for analytics and social sharing functionalities. The hosting environment is Vox Teneo Web Engine. Despite a professional design and good SEO practices, the site suffers from slow loading times and basic accessibility. The absence of HTTPS and TLS protocols is a major technical deficiency. The site uses a cookie compliance module that supports GDPR requirements. The technical stack is modern but requires urgent security upgrades and performance optimization to meet enterprise standards.
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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