Sister Sites · Other · United Kingdom
Medium risk. 7 critical or high findings in Email security, Security headers and 2 other checks.
Sister-Sites.co.uk operates as a specialized UK-focused online gambling informational and affiliate platform, providing comprehensive listings and reviews of sister sites related through common operators. The website positions itself as a trusted authority in the UK market, offering detailed operator and license information, player feedback, and exclusive bonuses. The business targets UK gambling players seeking reliable information on casinos, bingo, and betting sites. Technically, the site is built on WordPress with modern styling via Tailwind CSS and integrates Google Analytics and Tag Manager for user tracking, alongside hCaptcha for bot mitigation. The site is mobile-optimized and demonstrates good SEO and accessibility practices. Security-wise, the site enforces HTTPS and uses bot protection but lacks explicit security headers and incident response contacts, which could be improved. The domain WHOIS data is unavailable due to a Nominet UK registration error, which raises some concerns about domain legitimacy, though the website content and branding appear professional and consistent. Overall, the site presents a moderate risk profile with recommendations to enhance security policies and domain registration transparency.
Scanned
NIS2 Art. 21(2)
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.
7 findings rated critical or high. Fix these first.
SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.
Domain is vulnerable to email spoofing
What to do: Implement SPF, DKIM, and DMARC immediately
SPF helps prevent email spoofing
What to do: Add SPF record: "v=spf1 include:_spf.yourmailprovider.com ~all"
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.
Forces HTTPS connections
What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"
Prevents clickjacking attacks
What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"
Controls resources the browser is allowed to load
What to do: Implement a Content-Security-Policy appropriate for your application
These are the privacy signals visitors and data protection authorities look for under GDPR.
GDPR requires clear information about cookie usage
What to do: Add a dedicated cookie policy explaining cookie usage and purposes
Need hands-on remediation? Email guard@offseq.com
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Each check with its score, findings and the evidence it collected.
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
Not counted
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.
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
Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.
Leaked records that mention sister-sites.co.uk, from OffSeq Breach.
No leaked records found
Breach holds no records for sister-sites.co.uk right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.
Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.
Automated reading of the public site. Ratings are indicative.
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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