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Security report for 4ange.com

4ange · Finance · Russia

Medium risk. 4 critical or high findings in GDPR outside view and SSL/TLS.

Security score

75/100

Risk levelMedium

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

4ange.com is a Russian-language cryptocurrency exchange platform established in 2019, offering a wide range of crypto and fiat currency exchange services. The website provides users with the ability to buy and sell various cryptocurrencies including Bitcoin, Ethereum, USDT, and many others, supporting multiple payment systems and bank cards. The platform targets cryptocurrency users primarily in Russia and Russian-speaking regions, positioning itself as a reliable and comprehensive exchange service with competitive rates and a user account system featuring notifications and security measures such as captcha verification. Technically, the website employs modern JavaScript libraries and frameworks, including jQuery, Tom Select, and Select2, and uses Cloudflare for DNS services. The site is mobile-optimized with good navigation and SEO practices. Security is enforced through HTTPS, clientTransferProhibited domain status, and input validation on forms. However, some security headers like Content-Security-Policy are missing, and DNSSEC is not enabled, representing areas for improvement. From a security perspective, the platform demonstrates a moderate security posture with good practices in place but lacks a formal vulnerability disclosure policy and some advanced security headers. Privacy compliance is basic, with a privacy policy and terms of service present but no cookie consent mechanism detected. The domain WHOIS data is consistent and transparent, supporting the legitimacy of the business. Overall, 4ange.com is a professional and trustworthy cryptocurrency exchange service with room for enhancement in privacy compliance and security hardening. Strategic recommendations include enabling DNSSEC, implementing a Content-Security-Policy header, adding a security.txt file, and introducing a cookie consent mechanism to improve compliance and user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
50/ 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

4 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.

    • 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.

    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching 4ange.com

This scan found 18 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
72
Security headers
65
Email security
85
DNS health
75
Network security
100
GDPR outside view
50
Average
75

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

4ange operates in the competitive cryptocurrency exchange market, focusing on Russian-speaking customers. Its business model revolves around currency exchange services, leveraging multiple payment systems and bank cards to facilitate transactions. The company appears to have a medium-sized operation with a well-established presence since 2019. The platform's integration with bestchange.ru and the extensive list of supported currencies and payment methods indicate a broad partnership ecosystem and a focus on user convenience. The lack of explicit parent or subsidiary companies suggests an independent operation. Growth indicators include multi-language support and a user account system with notifications, enhancing customer engagement and retention.

Security posture

The website enforces HTTPS and uses clientTransferProhibited status on its domain, which are positive security indicators. Input validation and captcha mechanisms on registration and password reset forms reduce the risk of automated attacks. However, the absence of DNSSEC and Content-Security-Policy headers exposes the platform to potential DNS spoofing and cross-site scripting risks. No visible security.txt or vulnerability disclosure page limits transparency and responsiveness to security issues. Privacy compliance is partial, lacking cookie consent mechanisms. Overall, the security posture is moderate but could be significantly improved by adopting recommended best practices and enhancing transparency.

Recommendations

  1. Enable DNSSEC on the domain to secure DNS queries and prevent spoofing.
  2. Implement a comprehensive Content-Security-Policy header to mitigate XSS and data injection attacks.
  3. Create and publish a security.txt file to facilitate responsible vulnerability disclosure.
  4. Add cookie consent banners and mechanisms to comply with privacy regulations like GDPR.
  5. Enhance security headers by including X-Content-Type-Options, Referrer-Policy, and others to harden browser security.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
4ange
Description
4ange – обменный пункт, который предлагает лучший курс обмена криптовалют. С помощью нашего сервиса обмена можно легко поменять все типы электронных валют.
Key services
Cryptocurrency exchange, Currency conversion, Payment processing via multiple payment systems and bank cards
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, jQuery, Tom Select, Select2, Cloudflare DNS, WebSocket chat widget
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited domain status
  • Captcha on registration and password reset
  • Input validation on forms
  • No exposed sensitive data in HTML

Analytics and tracking

Tracking level
moderate
Privacy practices
basic

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website offers a comprehensive cryptocurrency exchange service with multiple crypto and fiat currencies.
  2. Site is primarily in Russian with multi-language support.
  3. Registration and login forms use captcha and input validation.
  4. No explicit privacy or cookie consent banners detected.
  5. No visible social media or phone contact information.
  6. Security headers partially implemented; HTTPS enforced.
  7. Domain WHOIS data is consistent and transparent.
  8. No signs of adult or questionable content.
  9. Site uses Cloudflare DNS and NameCheap registrar.
Technical notes

Notes

The website uses a modern JavaScript-based front-end with libraries such as jQuery, Tom Select, and Select2 for enhanced UI components. It integrates a WebSocket chat widget for real-time communication and employs Cloudflare DNS services. The site is mobile-optimized and features good SEO practices with appropriate meta tags. Performance is moderate, with deferred loading of some scripts and use of CDN-hosted libraries. However, the absence of a CMS or framework identification suggests a custom-built platform. Technical debt appears low, but improvements in security headers and privacy compliance are needed to modernize and secure the infrastructure further.
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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