Skip to main content

Security report for csl.com

CSL Limited · Healthcare · Australia

Medium risk. 2 critical or high findings in Security headers and SSL/TLS.

Security score

74/100

Risk levelMedium

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

CSL Limited is a leading global biotechnology company headquartered in Melbourne, Australia, with a history dating back to 1916. The company operates through three main business units: CSL Behring, CSL Seqirus, and CSL Vifor, providing a broad portfolio of lifesaving medicines including plasma-derived therapies, recombinant therapies, vaccines, and treatments for iron deficiency and nephrology. The website reflects a mature enterprise with a strong market position in healthcare biotechnology, serving patients in over 100 countries. The digital infrastructure incorporates modern technologies such as Google Tag Manager and OneTrust for privacy compliance, with a professional and accessible design optimized for mobile and desktop users.

Scanned

NIS2 and GDPR posture

GDPR outside view
88/ 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

2 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 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. 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 csl.com

This scan found 20 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.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

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
50
Email security
60
DNS health
80
Network security
100
GDPR outside view
88
Average
74

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

CSL's market positioning as a global biotechnology leader is supported by its diversified product portfolio and extensive R&D capabilities. The company emphasizes innovation, sustainability, and patient support, which are evident in the website's content and navigation structure. The presence of multiple subsidiaries and dedicated domains for business units indicates a complex organizational structure. CSL's business model focuses on pharmaceutical manufacturing and distribution with a strong emphasis on research-driven product development. The company targets healthcare providers, patients, and public health organizations worldwide. Strategic partnerships and a comprehensive online presence enhance its competitive advantage and growth potential.

Security posture

The website demonstrates a solid security posture with HTTPS enforcement and cookie consent mechanisms aligned with GDPR requirements. However, explicit security headers such as Content-Security-Policy and X-Frame-Options are not visibly implemented in the HTML source, representing an area for improvement. No vulnerabilities or exposed sensitive data were detected. The absence of a published security policy or incident response contact limits transparency in security governance. The lack of a security.txt file or vulnerability disclosure program suggests an opportunity to enhance security communication and incident management readiness. Overall, the security maturity is good but could benefit from formalized policies and enhanced header configurations.

Recommendations

  1. Implement and explicitly configure security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to strengthen browser security.
  2. Publish a dedicated security policy page and provide clear incident response contact information to improve transparency and trust.
  3. Establish a security.txt file and vulnerability disclosure program to facilitate responsible reporting of security issues.
  4. Regularly audit third-party scripts and tracking technologies to mitigate supply chain risks.
  5. Enhance data protection officer visibility and provide direct contact details to comply with privacy regulations and improve user trust.

Contact details published on the site

Addresses
Legal name
CSL Limited
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
CSL Limited
Description
CSL (ASX:CSL; USOTC:CSLLY) is a leading global biotechnology company with a dynamic portfolio of lifesaving medicines, including those that treat haemophilia and immune deficiencies, vaccines to prevent influenza, and therapies in iron deficiency, dialysis and nephrology. Since our start in 1916, we have been driven by our promise to save lives using the latest technologies. Today, CSL – including our three businesses, CSL Behring, CSL Seqirus and CSL Vifor – provides lifesaving products to patients in more than 100 countries. Our unique combination of commercial strength, R&D focus and operational excellence enables us to identify, develop and deliver innovations so our patients can live life to the fullest.
Key services
plasma-derived therapies, recombinant therapies, influenza vaccines, iron deficiency therapies, dialysis and nephrology therapies
Content quality
excellent
Branding
consistent

Technology

Stack
Google Tag Manager, OneTrust Cookie Consent, Brightcove video player, CSS Plyr, Custom CSS (Montserrat font)
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML
  • No vulnerable libraries detected

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Marketing tools
OneTrust Cookie Consent
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 and structured navigation.
  2. Strong focus on biotechnology and healthcare services.
  3. Comprehensive privacy and cookie policies with consent mechanisms.
  4. No signs of adult or questionable content.
  5. WHOIS data unavailable publicly, possibly due to privacy protection.
  6. Use of modern tracking and consent technologies.
  7. No visible security policy or incident response contact on main site.
  8. No security.txt or vulnerability disclosure found.
Technical notes

Notes

The website uses a modern technology stack including Google Tag Manager for analytics and OneTrust for cookie consent management, indicating compliance with privacy regulations. The use of Brightcove suggests video content capabilities. The site employs custom CSS and web fonts for branding consistency. Performance is moderate with good mobile optimization and accessibility features. No CMS or hosting provider was explicitly identified from the source. SEO is supported by proper meta tags, Open Graph, and JSON-LD structured data, enhancing search engine visibility. Technical risks are minimal, but the absence of some security headers and explicit hosting details suggests areas for further technical hardening and transparency.
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

Reviews of this site

Share your experience with csl.com. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review csl.com.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.