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Security report for c20society.org.uk

The Twentieth Century Society · Non-profit · United Kingdom

High risk. 4 critical or high findings in Network security, Security headers and 1 other check.

Security score

49/100

Risk levelHigh

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

The Twentieth Century Society is a UK-based non-profit organization dedicated to campaigning for the preservation and appreciation of outstanding 20th-century buildings. The website serves as a comprehensive platform offering news, resources, membership services, and event information, positioning the society as a reputable and established entity within the heritage conservation sector. The site demonstrates a consistent brand identity and strong partnerships with notable architectural firms and grant funders, reinforcing its credibility and influence. Technically, the website is built on WordPress and employs a modern technology stack including Google reCAPTCHA, Google Maps API, and social media integrations. The site is moderately performant with good mobile optimization and basic accessibility features. Analytics and tracking are implemented responsibly with Jetpack, Google Analytics, and Hotjar, balanced with privacy compliance measures. From a security perspective, the site enforces HTTPS and uses reCAPTCHA to protect forms, with no visible vulnerabilities or exposed sensitive data. However, some security headers could be improved to enhance protection. Privacy and cookie policies are present and GDPR compliant, supporting a strong privacy posture. Overall, the website is professional, trustworthy, and well-maintained, with a high legitimacy score based on domain age and registration data. There are no critical security or compliance issues detected, making it a low-risk digital presence for the organization.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 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

4 findings rated critical or high. Fix these first.

  1. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • Critical

      Critical Service Exposed: MySQL

      Port 3306 (MySQL) is publicly accessible - MySQL - Database server

      What to do: Immediately restrict access to MySQL using firewall or VPN

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection
    • High

      High-Risk Service Exposed: FTP

      Port 21 (FTP) is publicly accessible - FTP - Often unencrypted file transfer

      What to do: Consider restricting access to FTP or implementing strong authentication

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

  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 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. 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

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

Keep watching c20society.org.uk

This scan found 24 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.

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  • 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
72
Security headers
60
Email security
75
DNS health
65
Network security
0
GDPR outside view
83
Average
59
After the cap
49

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 · found on this site
  • 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 c20society.org.uk, from OffSeq Breach.

Total records
2
Employees
0
Customers
2
Third parties
0
Weak passwords
0%

1 subdomain 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 c20society.org.uk.

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

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Brand lookalikes

Add-on

Domains that imitate c20society.org.uk and could be used for phishing or spoofed email, tracked in OffSeq Breach.

Tracked
4
Registered
4
Resolving
4
High or critical
0

Last checked 2026-06-19

Masked preview

  • c2••••••••.org.ukLowbitsquatting
  • c2•••.society.org.ukLowsubdomain
  • c2••••••.ty.org.ukLowsubdomain

See the full lookalike list

A one-off add-on that lists up to 20 of the highest-risk lookalikes of c20society.org.uk with registration, mail-server, certificate and DNS signals.

Select it in the checkout above.

Lookalike data refreshes continuously. Monitoring on Breach alerts you when a variant is registered, gains a mail server or starts serving HTTPS.

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Technical appendix

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

Business context

Business profile

The Twentieth Century Society operates as a small-sized non-profit entity focused on architectural heritage conservation in the UK. Its business model relies on memberships, donations, and educational outreach. The society holds a strong market position within the heritage sector, supported by partnerships with leading architectural firms and grant funders such as Historic England and Cadw. Revenue streams likely include membership fees, donations, and sales from its online shop. The target audience includes heritage enthusiasts, architects, historians, and the general public interested in modern architecture. The organization demonstrates growth and engagement through regular news updates, events, and campaigns. Its partnership ecosystem is robust, involving both commercial and non-profit entities, enhancing its operational reach and influence.

Security posture

The website exhibits a mature security posture with HTTPS enforced and the use of Google reCAPTCHA to mitigate automated abuse on forms. No exposed sensitive data or vulnerable libraries were detected in the HTML content. The presence of security plugins like Jetpack and Akismet indicates proactive security management. However, the absence of explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options suggests room for improvement. There is no published security policy or incident response contact information, which could enhance transparency and preparedness. Overall, the site is secure for its purpose but would benefit from additional hardening and formal security documentation.

Recommendations

  1. Implement and enforce Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options HTTP headers to strengthen security.
  2. Publish a formal security policy and incident response contact details to improve transparency and readiness.
  3. Maintain regular updates of WordPress core, themes, and plugins to mitigate emerging vulnerabilities.
  4. Enhance accessibility features to meet higher standards for inclusive user experience.
  5. Continue monitoring and auditing privacy compliance to ensure ongoing GDPR adherence.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
The Twentieth Century Society
Description
The Twentieth Century Society is a UK-based non-profit organization campaigning for the preservation and appreciation of outstanding 20th-century buildings and architectural heritage.
Key services
Campaigning for building preservation, Publishing news and magazines, Organizing events and lectures, Providing resources and casework support
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress, PHP, JavaScript, Google reCAPTCHA, Google Maps API, Facebook SDK, Twitter Widgets, Jetpack, Aurora Heatmap, DFlip PDF viewer
Frameworks
WordPress
Platforms
WordPress CMS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of Google reCAPTCHA on forms
  • No exposed sensitive data in HTML
  • Use of security plugins (Jetpack, Akismet)

Analytics and tracking

Services
Jetpack Stats, Google Analytics, Hotjar
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Jetpack Stats, Hotjar, Google Analytics (via Google Tag Manager)
Marketing tools
Hotjar, Jetpack
Transparency
good

Site quality

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

Key observations

  1. Website is a professionally maintained non-profit society site focused on 20th-century architectural heritage.
  2. Content is rich, well-structured, and includes news, events, resources, and membership information.
  3. Multiple external partnerships and sponsors are prominently displayed, enhancing trust.
  4. Security best practices are generally followed, with HTTPS and reCAPTCHA implemented.
  5. Privacy and cookie policies are present and GDPR compliant.
  6. No suspicious or malicious content detected.
  7. Use of modern web technologies and analytics tools is evident.
Technical notes

Notes

The website is powered by WordPress CMS with a combination of PHP and JavaScript technologies. It integrates several third-party services including Google reCAPTCHA for bot protection, Google Maps API for location services, and social media SDKs for Facebook and Twitter. The site uses Jetpack for analytics and security features, and Hotjar for user behavior analysis. Performance is moderate with some caching and optimization plugins evident. Mobile responsiveness is good, and SEO practices are implemented with proper meta tags and structured navigation. Technical debt appears low, but there is an opportunity to improve security headers and accessibility compliance. Hosting provider details are not explicitly disclosed but the domain is registered with a reputable UK registrar. Overall, the technical infrastructure supports a stable and professional web presence.
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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