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Security report for telstra.com.au

TELSTRA CORPORATION LIMITED · Telecommunications · Australia

Low risk. 3 critical or high findings in Security headers and GDPR outside view.

Security score

80/100

Risk levelLow

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

Telstra Corporation Limited operates Australia's largest mobile network and offers a broad range of telecommunications services including mobile plans, NBN broadband, 5G, and streaming services. The website is professionally designed, well-branded, and targets both personal consumers and business customers within Australia. It demonstrates a mature digital presence with comprehensive content and clear navigation. The technical infrastructure leverages Adobe Experience Manager CMS, Adobe Launch for tag management, New Relic for performance monitoring, and LivePerson for customer chat support, indicating a modern and well-maintained platform. Security posture is strong with HTTPS enforced and no visible vulnerabilities or exposed sensitive data. Privacy and cookie policies are present and comprehensive, supporting GDPR compliance. WHOIS data is limited due to Australian domain policies but aligns with a legitimate and established entity. Overall, the website reflects a high level of professionalism, trustworthiness, and operational maturity.

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

3 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. 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 telstra.com.au

This scan found 14 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

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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
100
Security headers
55
Email security
85
DNS health
85
Network security
100
GDPR outside view
53
Average
80

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

Telstra holds a dominant market position in Australian telecommunications, serving a wide customer base with mobile, internet, and entertainment services. The business model focuses on subscription-based plans and device sales, supported by loyalty programs like Telstra Plus. The company maintains partnerships and subsidiaries evident from linked domains. The website content and structure support customer acquisition and retention strategies. The use of advanced analytics and marketing tools indicates a data-driven approach to customer engagement. The absence of suspicious WHOIS data and consistent branding further reinforce business credibility.

Security posture

The website exhibits a strong security posture with enforced HTTPS, use of security best practices, and no visible security misconfigurations or vulnerabilities in the HTML content. However, explicit security headers such as Content-Security-Policy and X-Frame-Options are not visibly confirmed and should be audited. There is no public incident response or vulnerability disclosure policy found, which could be improved to enhance transparency and security culture. Privacy compliance is well addressed with clear policies and consent mechanisms. Overall, the security maturity is high but could benefit from more explicit security policy disclosures.

Recommendations

  1. Audit and explicitly implement security headers like Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  2. Publish a public vulnerability disclosure and incident response policy to improve transparency and trust.
  3. Enhance visibility of security certifications or compliance frameworks if applicable.
  4. Regularly review third-party scripts and dependencies for vulnerabilities.
  5. Maintain and update privacy and cookie policies to reflect evolving regulations and best practices.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
TELSTRA CORPORATION LIMITED
Description
Join Australia's largest mobile network, view our plans for NBN broadband internet, mobile phones, 5G & on demand streaming services.
Key services
Mobile plans, NBN broadband internet, Mobile phones, 5G services, On demand streaming services
Content quality
excellent
Branding
consistent

Technology

Stack
Adobe Helix RUM, Adobe Launch, New Relic, Lottie Player, LivePerson Chat
Frameworks
Adobe Experience Manager (AEM)
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of secure third-party scripts
  • No visible vulnerable libraries

Analytics and tracking

Services
Adobe Helix RUM, New Relic
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Adobe Launch, New Relic, LivePerson
Marketing tools
Adobe Helix RUM, Adobe Launch, LivePerson Chat
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 no blocking detected.
  2. Strong corporate branding and consistent messaging.
  3. Comprehensive navigation and clear calls to action.
  4. Use of modern web technologies and analytics tools.
  5. No exposed sensitive information or security issues detected in HTML.
  6. WHOIS data limited due to .au domain policies but consistent with legitimate Australian entity.
Technical notes

Notes

The website is built on Adobe Experience Manager, leveraging Adobe Launch for tag management and New Relic for performance monitoring, indicating a robust enterprise-grade infrastructure. The use of modern JavaScript libraries and lazy loading techniques supports good performance and mobile optimization. The site is well-structured with semantic HTML and accessibility considerations. However, performance is moderate and could be improved by optimizing resource loading and caching strategies. The technical stack is modern and aligns with industry standards for large telecommunications providers.
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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