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Security report for openweathermap.org

Openweather Ltd. · Technology · United Kingdom

Medium risk. 5 critical or high findings in Security headers, SSL/TLS and 1 other check.

Security score

63/100

Risk levelMedium

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

Openweather Ltd., operating the OpenWeatherMap platform, is a well-established UK-based company founded in 2012 that provides comprehensive weather data services globally. Their offerings include current, forecast, and historical weather data accessible via a variety of APIs, specialized dashboards for energy and extreme weather, and interactive weather maps. The company targets developers and businesses requiring reliable and detailed meteorological data, positioning itself as a leading technology provider in the weather data industry. The website reflects a mature digital presence with professional design, clear navigation, and extensive content relevant to its audience. Technically, the website employs modern web technologies including Bootstrap, Vue.js, and integrates Google Analytics and Sentry for monitoring. Hosting is inferred to be on Amazon AWS, supported by AWS DNS servers. The site is mobile-optimized and SEO-friendly, though some accessibility features are basic. Performance is moderate, with room for improvement in explicit security headers and DNS security. From a security perspective, the site enforces HTTPS and uses clientTransferProhibited domain status, indicating domain security awareness. However, DNSSEC is not enabled, and no explicit security policy or incident response contacts are published. The cookie consent mechanism complies with GDPR, and privacy policies are comprehensive. No critical vulnerabilities or malicious indicators were found, but improvements in security headers and vulnerability disclosure would enhance the security posture. Overall, OpenWeatherMap demonstrates a strong business and technical foundation with high trustworthiness and compliance. Strategic enhancements in security transparency and DNS security would further solidify its position and reduce risk exposure.

Scanned

This is an earlier scan of openweathermap.org. View the latest report

NIS2 and GDPR posture

GDPR outside view
95/ 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

5 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. 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

  3. DNS health

    DNS sends visitors and email to the right servers. Misconfigured records can cause outages or let someone redirect your traffic.

    • High

      Unregistered MX Record

      MX record points to unregistered domain: aspmx1.googlemail.com

      What to do: Remove or fix MX record pointing to unregistered domain

      • RFC 5321 §5.1
      • NIS2 21(2)(i)
      • IR 2024/2690 12.4: Implementing Regulation (EU) 2024/2690, Annex point 12.4: Asset inventory
      • NIST CM-8: NIST SP 800-53 Rev. 5 CM-8: System Component Inventory

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

Keep watching openweathermap.org

This scan found 22 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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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
77
Security headers
15
Email security
85
DNS health
65
Network security
40
GDPR outside view
95
Average
63

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

Openweather Ltd. holds a strong market position as a global provider of weather data APIs and dashboards, serving a diverse clientele including developers, businesses in renewable energy, agriculture, and risk management. Their business model revolves around subscription-based API access with freemium tiers and pay-as-you-call options, supplemented by specialized dashboards and marketplace data products. The company leverages partnerships and maintains an active ecosystem with related domains and services. Growth indicators include extensive API usage, a large network of weather stations, and integration with major platforms like Google AdWords. The company’s transparent WHOIS data and long domain age support its credibility. Strategic observations suggest continued expansion in specialized industry solutions and enhanced data offerings.

Security posture

The security posture of OpenWeatherMap is solid but not without gaps. HTTPS is enforced site-wide, and domain registration protections are in place. The use of Sentry for error monitoring indicates proactive incident detection. However, the absence of DNSSEC and explicit security headers such as Content-Security-Policy and X-Frame-Options reduces defense-in-depth. No public security policy or vulnerability disclosure mechanism was found, which may hinder coordinated vulnerability management. The cookie consent banner and privacy policy demonstrate GDPR compliance, but incident response readiness and security culture indicators are not publicly visible. Overall, the site is secure for general use but would benefit from enhanced DNS security, published security policies, and explicit security headers to mitigate advanced threats.

Recommendations

  1. Enable DNSSEC on the domain to improve DNS integrity and prevent spoofing.
  2. Publish a formal security policy and incident response contact information on the website.
  3. Implement and explicitly declare security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  4. Create a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
  5. Regularly audit third-party scripts and dependencies to ensure no vulnerable libraries are included.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Openweather Ltd.
Description
OpenWeather provides comprehensive weather data services, including current, forecast, and historical weather information. Offers APIs for solar radiation, road risk assessment, solar energy prediction, and more with global coverage.
Key services
Current weather data, Forecast data (minute, hourly, daily, climatic), Historical weather data, Weather maps, Specialized dashboards (Energy, Extreme Weather, General Weather Dashboard), Widgets and marketplace
Content quality
excellent
Branding
consistent

Technology

Stack
Bootstrap 3.4.1, Font Awesome 4.7.0, Google Fonts (Oswald, Roboto), Google Analytics, Raven.js (Sentry error tracking), Leaflet.js (mapping), Custom JavaScript bundles, Vue.js (inferred from data-v- scoped styles)
Frameworks
Bootstrap, Vue.js
Platforms
Web, Mobile (Android and iOS apps)
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited domain status
  • Use of Sentry for error monitoring
  • Cookie consent banner with opt-in/opt-out

Analytics and tracking

Services
Google Analytics, Sentry (Raven.js)
Tracking level
moderate
Privacy practices
good

Advertising

Transparency
good

Site quality

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

Key observations

  1. Website provides extensive weather data services with multiple API offerings and dashboards.
  2. Strong presence of professional content and clear business model.
  3. Good privacy and cookie compliance with consent mechanisms.
  4. No signs of malicious or suspicious activity.
  5. Use of modern web technologies and analytics tools.
  6. No explicit security policy or incident response contact found.
  7. DNSSEC not enabled, which is a minor security gap.
  8. Social media presence across major platforms.
  9. Multiple external trusted domains linked for services and partnerships.
Technical notes

Notes

The website is built on a modern technology stack including Bootstrap for responsive design and Vue.js for frontend interactivity. It integrates Google Analytics and Google Tag Manager for tracking and Sentry for error monitoring. Hosting is likely on Amazon AWS, supported by AWS DNS servers. The site is mobile-optimized with good SEO practices and a professional design. Performance is moderate, with some potential for optimization in loading times and accessibility improvements. The absence of a detected CMS suggests a custom or proprietary platform. Technical risks include missing DNSSEC and incomplete security header implementation, which could be addressed to improve overall resilience.
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

Earlier scans of this domain

  1. 63/100Medium30 findingsView report
  2. 63/100Medium30 findingsView report
  3. 63/100Medium30 findingsView report
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