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Security report for cosl.com.sg

China Oilfield Services Limited · Energy · China

Partial score · DNS & email only

56/100

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

China Oilfield Services Limited (COSL) is a leading integrated offshore oilfield services provider primarily serving the Asian market with a global footprint. The company offers a comprehensive range of services including geophysical surveys, drilling, well services, and marine support, supported by a large fleet of vessels and advanced technical equipment. The website reflects COSL's enterprise scale and market leadership with detailed service descriptions and investor information. Technically, the website uses standard web technologies such as jQuery and JavaScript, with moderate performance and basic mobile optimization. Security posture is moderate but could be improved by implementing HTTPS enforcement and security headers. Privacy compliance is weak due to the absence of privacy and cookie policies. Overall, the website is professional and trustworthy but would benefit from enhanced security and privacy features.

Scanned

NIS2 and GDPR posture

GDPR outside view
25/ 100 · Critical
Checks completed
6of 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 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

    • 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

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

Keep watching cosl.com.sg

This scan found 12 issues across 5 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
0
Email security
83
DNS health
70
Network security
100
GDPR outside view
25
Average
56

Not counted

  • Security headers: did not complete in this scan.
  • 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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention cosl.com.sg, from OffSeq Breach.

Total records
199
Employees
5
Customers
180
Third parties
14
Weak passwords
9%

Latest record dated 2026-06-17 · 13 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for cosl.com.sg.

Select it in the checkout above.

Masked preview

  • –shares.cosl.com.sg2026-06-17
  • –exchange.cosl.com.sg2025-07-20
  • –exchange.cosl.com.sg2025-07-16
  • –coslbid.cosl.com.sg2025-05-28
  • –intranet.cosl.com.sg2025-04-14

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

COSL holds a strong market position as a major player in the offshore oilfield services sector, backed by its parent company CNOOC. Its business model focuses on providing integrated and turnkey solutions across the oil and gas exploration and production lifecycle. The company targets industry clients worldwide, including investors and partners. The website content and structure support investor relations and customer engagement, highlighting corporate governance, social responsibility, and QHSE commitments. Subsidiaries and global offices indicate a broad operational footprint. The company leverages partnerships for corporate mail and analytics services. Growth indicators include recent news releases and investor updates.

Security posture

The website demonstrates a basic security posture with no visible HTTPS enforcement or security headers in the provided data. Forms include basic input validation but lack advanced security controls. No incident response or vulnerability disclosure information is provided, indicating potential gaps in security transparency. Tracking scripts from Baidu and TRS suggest moderate user tracking without clear privacy disclosures. The absence of cookie consent and privacy policies further highlights compliance risks. Recommendations include implementing HTTPS, security headers, privacy policies, and incident response contacts to improve security maturity and regulatory compliance.

Recommendations

  1. Implement HTTPS with HSTS and ensure all site resources load securely.
  2. Add standard security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Publish comprehensive privacy and cookie policies with clear consent mechanisms.
  4. Establish and publicize a vulnerability disclosure policy and incident response contact information.
  5. Enhance mobile optimization and accessibility features to improve user experience and compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
China Oilfield Services Limited
Description
China Oilfield Services Limited (COSL) is the leading integrated oilfield services provider in the Asian offshore market. COSL’s four main service divisions—Geophysical Services, Drilling Services, Well Services, and Marine and Transportation Services—cover the exploration, development, and production phases of the oil and gas industry. COSL operates a large fleet of vessels and rigs and offers advanced oilfield technical services.
Key services
Geophysical Services, Drilling Services, Well Services, Marine Support Vessels, Directional Drilling, Logging, Cementing, Workover, Production and Optimization, Well Completion
Content quality
good
Branding
consistent

Technology

Stack
jQuery, JavaScript, CSS
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
basic

Security

Observed score
55/100
Good practices seen
  • No exposed sensitive data in HTML
  • Search form input with basic validation

Analytics and tracking

Services
Baidu Analytics, TRS Analytics
Tracking level
moderate
Privacy practices
poor

Advertising

Tracking pixels
Baidu Analytics (hm.baidu.com), TRS (ta.trs.cn)
Transparency
basic

Site quality

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

Key observations

  1. Website content is fully accessible and not blocked by WAF or security challenges.
  2. No explicit privacy or cookie policies found on the site.
  3. Contact information is limited to contact page links; no direct emails or phone numbers found in HTML.
  4. Security headers and HTTPS enforcement details are not visible in provided data; potential area for improvement.
  5. The site uses Baidu Analytics and TRS tracking scripts indicating moderate user tracking.
  6. The site is professionally designed with clear navigation and consistent branding.
  7. Business information is comprehensive and consistent with a large energy sector enterprise.
Technical notes

Notes

The website uses a traditional web stack with jQuery and JavaScript for interactivity and CSS for styling. The HTML structure is valid and well-organized, supporting good navigation clarity. Performance is moderate with some image-heavy content such as banners and sliders. Mobile optimization is basic, with no explicit responsive design frameworks detected. No CMS or hosting provider information is evident. The site uses external analytics services from Baidu and TRS. Technical debt is moderate, with opportunities to modernize the tech stack and improve security configurations.
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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