heritageopendays.org.uk security report

Certificate, security headers, email authentication, DNS, registration, and exposed hosts — from public sources.

32risk

Moderate

Some surface to tighten, nothing urgent.

0Critical

0High

3Medium

2Low

2Info

Collected 18 hours ago49.7sfrom cache

Certificate Transparency
DNS resolution3
Network ownership0
CDN / WAF detection0
Exposed ports & CVEs37
Registration
DNS posture2
Email authentication2
Certificate
Security headers4
Archived URLs
Analysis7

noteCertificate Transparency did not complete (HTTP 502). Results below are partial.
noteCertificate inspection is unavailable in this runtime.
noteNetwork ownership lookup is unavailable in this runtime; ASN and org are omitted.
noteCDN/WAF detection is unavailable in this runtime.
note3 hosts were identified as CDN/edge infrastructure from ASN ownership rather than a cdncheck fingerprint.

CSP is the main defence that limits what an injected script can do. Without it, any XSS bug is fully exploitable.
What to do
Start with a report-only policy, tighten it against the reports, then enforce.
asset: https://www.heritageopendays.org.uk/
Receivers are asked to report spoofing but not to block it. This is the right first step, and the wrong place to stop.
What to do
Once reports look clean, move to p=quarantine, then p=reject.
asset: heritageopendays.org.uk
Without clientTransferProhibited, a compromised registrar account can move the domain to another registrar in days, with no second step.
What to do
Enable the transfer lock (and registrar lock, if offered) in the registrar control panel.
asset: heritageopendays.org.uk
Browsers and the preload list expect at least six months; shorter values give little protection between visits.
What to do
Raise max-age to 31536000 (one year).
asset: https://www.heritageopendays.org.uk/
Answers for this domain are not signed, so a resolver cannot tell a forged response from a real one.
What to do
Enable DNSSEC at your DNS host and publish the DS record at the registrar.
asset: heritageopendays.org.uk
Mail to this domain can be downgraded to plaintext by an on-path attacker, because senders have no way to know TLS is required.
What to do
Publish an MTA-STS policy (a TXT record plus a small HTTPS-hosted file).
asset: heritageopendays.org.uk
Any public certificate authority may issue certificates for this domain. CAA lets you name the ones allowed to.
What to do
Add a CAA record naming your CA, e.g. `0 issue "letsencrypt.org"`.
asset: heritageopendays.org.uk

final https://www.heritageopendays.org.uk/status 200time 839msstack cloudflare

✓http:// redirects to https://
!Strict-Transport-Security
max-age=15552000; preload
✗Content-Security-Policy
✓Clickjacking protection
DENY
✓X-Content-Type-Options
nosniff
✓Referrer-Policy
strict-origin-when-cross-origin
–Permissions-Policyoptional
✓security.txt published

✓Receives mail via 1 server
heritageopendays-org-uk.mail.protection.outlook.com
✓SPFends in -all
v=spf1 include:spf.protection.outlook.com ip4:195.191.164.134 include:amazonses.com -all
!DMARCp=none
v=DMARC1;p=none;rua=mailto:5qa8kffk3Zh@dmarc-rua.mailcheck.service.ncsc.gov.uk;
!MTA-STSinbound mail can be downgraded to plaintext

!DNSSECanswers can be forged
–CAAany CA may issue
✓IPv6 (AAAA)
✓2 nameservers
sharon.ns.cloudflare.com vicky.ns.cloudflare.com

✓Registered with British Telecommunications Limited 24.7 years old
heritageopendays.org.uk
✓Registration expiry470 days
2027-12-21
✗Transfer lock
none
✓2 nameservers at registry
sharon.ns.cloudflare.com.vicky.ns.cloudflare.com.

Address	Ports	Edge	Network
104.26.4.227 heritageopendays.org.uk +3	80443205220532082208320862087+5	Cloudflare~	—
104.26.5.227 heritageopendays.org.uk +1	80443205320822083208620872095+4	Cloudflare~	—
172.67.71.89 heritageopendays.org.uk +1	80443205320822083208620872095+4	Cloudflare~	—

Archived URLs

Endpoints the Wayback Machine has kept — config files, backups, scripts. Slow to fetch, so it is here on request.

heritageopendays.org.uk security report

Moderate

Findings

Security headers

Email authentication

DNS

Registration

Hosts

Hostnames