Skip to main content

Security report for combinationlock.co.uk

CombinationLock.co.uk · Education · N/a

Medium risk. 6 critical or high findings in Email security, Security headers and 2 other checks.

Security score

63/100

Risk levelMedium

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

CombinationLock.co.uk is a niche educational website offering free math and logic games centered around a combination lock puzzle theme. The site targets a general audience interested in number puzzles and logic challenges, providing practice and multiplayer modes along with leaderboards. The business model relies on advertising revenue, integrating multiple ad networks and tracking vendors. Technically, the site uses standard web technologies including JavaScript, Google Fonts, and social media SDKs, with a basic but functional design and moderate performance. Security posture is moderate with HTTPS usage implied but lacking explicit security headers and no visible incident response or vulnerability disclosure information. Privacy compliance is supported by an embedded consent management platform, though no standalone privacy policy or terms of service pages are found. WHOIS data is unavailable due to domain registration errors, which raises some legitimacy concerns, but the site content and longevity since 1999 suggest a legitimate operation. Overall, the site is functional and safe but would benefit from improved transparency, security hardening, and clearer business contact information.

Scanned

NIS2 and GDPR posture

GDPR outside view
65/ 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

6 findings rated critical or high. Fix these first.

  1. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  2. 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 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';…

  3. 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 combinationlock.co.uk

This scan found 27 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
62
Security headers
30
Email security
60
DNS health
60
Network security
100
GDPR outside view
65
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

The website occupies a niche in the educational and entertainment sector, focusing on math and logic puzzles. Its competitive advantage lies in offering free, accessible games with a unique combination lock theme. Revenue is generated primarily through advertising partnerships with multiple ad networks. The target customers are casual gamers and learners interested in math puzzles. The site has a long history dating back to 1999, indicating stability. Partnerships with advertising and analytics vendors are extensive, but no direct business partnerships or subsidiaries are identified. Growth indicators are limited due to lack of business information. Strategic observations include the need for enhanced privacy transparency and security measures to maintain user trust and comply with evolving regulations.

Security posture

The security maturity level is moderate. The site uses HTTPS but lacks visible security headers such as Content Security Policy, HSTS, or X-Frame-Options, which are recommended best practices. No vulnerabilities or exposed sensitive data were detected in the analysis. The embedded consent management platform indicates awareness of GDPR compliance requirements. However, the absence of explicit privacy policies, terms of service, and incident response contacts represents compliance gaps. Data protection practices rely heavily on third-party ad and tracking vendors, which increases risk exposure. Incident response readiness and security culture indicators are not evident from the available data. Overall, the site should prioritize implementing security headers, publishing clear policies, and establishing incident response procedures.

Recommendations

  1. Implement comprehensive security headers including CSP, HSTS, and X-Frame-Options to enhance protection against common web attacks.
  2. Publish explicit privacy policy and terms of service pages detailing data handling, user rights, and compliance measures.
  3. Add clear contact information including business emails and phone numbers to improve transparency and user trust.
  4. Establish and communicate an incident response plan with dedicated security contact channels.
  5. Improve mobile responsiveness and accessibility to enhance user experience across devices.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
CombinationLock.co.uk
Description
Unlimited free number puzzles and number games using a combination lock. Test your math and logic skills by solving the clues to open the combination lock. Includes world Hi Score charts. Free number puzzles have never been so much fun.
Key services
Free math and logic games, Practice puzzles, Solo and multiplayer game modes, Hi score leaderboards
Content quality
basic
Branding
moderate

Technology

Stack
JavaScript, Google Fonts, Google Adsense, Facebook SDK, Twitter Widgets, IAB TCF Consent Management Platform
Performance
moderate
Mobile
basic
Accessibility
basic
SEO
basic

Security

Observed score
60/100
Good practices seen
  • Use of HTTPS (implied by https URL)
  • Consent management platform for GDPR compliance

Analytics and tracking

Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Google Adsense, Exponential Interactive (VDX.tv), AdMaxim, Index Exchange, Quantcast, BeeswaxIO, Sovrn, Adkernel, Adikteev, RTB House, The UK Trade Desk, Nexxen, Epsilon, Yahoo EMEA, ADventori, Triple Lift, Xandr
Tracking pixels
Google Adsense, Facebook SDK, Twitter Widgets, IAB TCF CMP
Marketing tools
Google Adsense, Facebook Pixel, Twitter Pixel
Transparency
good

Site quality

Design
basic
User experience
basic
Content relevance
good
Navigation
good
Professionalism
basic
Trustworthiness
moderate

Key observations

  1. Website offers free math and logic games with a combination lock puzzle theme.
  2. Content is accessible and not blocked by WAF or security challenges.
  3. No explicit privacy policy or terms of service pages found.
  4. Consent management platform is implemented for GDPR compliance.
  5. No company contact emails or phone numbers found on the site.
  6. Advertising is heavily integrated with multiple ad networks and tracking vendors.
  7. WHOIS data is unavailable due to domain registration error, raising some legitimacy concerns.
  8. Website design and technical implementation are basic but functional.
  9. No security headers detected in provided data; SSL usage assumed but not verified.
  10. No evidence of security incident response or vulnerability disclosure information.
Technical notes

Notes

The website employs a traditional web stack with JavaScript-driven interactive elements, Google Fonts for typography, and integration of social media SDKs (Facebook, Twitter) and Google Adsense for monetization. The presence of an IAB TCF consent management platform indicates compliance with privacy regulations. Performance is moderate with no explicit indicators of optimization or modern frameworks. The site lacks a detected CMS, suggesting a custom or static site architecture. Mobile optimization is basic, with some CSS media queries for orientation but limited advanced responsiveness. Accessibility features are minimal but present. Technical debt appears low but modernization opportunities exist, especially in adopting modern frameworks and improving SEO and accessibility 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

Reviews of this site

Share your experience with combinationlock.co.uk. 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 combinationlock.co.uk.

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.