sproutstudio.com security report

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

71risk

Elevated

Several issues worth triaging this week.

1Critical

0High

4Medium

3Low

2Info

Collected 16 hours ago69.3sfrom cache

Certificate Transparency5
DNS resolution9
Network ownership0
CDN / WAF detection0
Exposed ports & CVEs10
Registration
DNS posture6
Email authentication2
Certificate
Security headers6
Archived URLs
Analysis10

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.

Shodan matched these CVEs against the service banners it saw on 151.236.16.238 (info.sproutstudio.com), which advertise openssh 9.9. These are version-fingerprint matches, not confirmed exploits: a distribution may have back-ported the fix while leaving the banner unchanged. Severity reflects the volume of known issues associated with this host, not a CVSS score. CVE-2026-60002 CVE-2026-60001 CVE-2026-60000 CVE-2026-59999 CVE-2026-59998 CVE-2026-59997 CVE-2026-59996 CVE-2026-59995 CVE-2026-35414 CVE-2026-35388 CVE-2026-35387 CVE-2026-35385 CVE-2025-32728 CVE-2025-26466 CVE-2025-26465 ...and 3 more
What to do
Confirm the running versions on 151.236.16.238 and compare them against the current security release for each package before treating any single CVE as live.
CVE-2026-60002 ↗CVE-2026-60001 ↗CVE-2026-60000 ↗CVE-2026-59999 ↗CVE-2026-59998 ↗
asset: 151.236.16.238
151.236.16.238 (info.sproutstudio.com) reports openssh 9.9. Publishing precise versions lets anyone match the host against a CVE feed without probing it, which is how targets get shortlisted for mass exploitation after a new advisory lands.
What to do
Suppress version tokens in server banners (for example `ServerTokens Prod` in Apache) and keep the packages current.
asset: 151.236.16.238
Public SSH invites credential stuffing and key brute force.
What to do
Restrict 22/tcp to a VPN, bastion, or allow-listed source range.
asset: 151.236.16.238:22
The browser will also send this cookie over plain http://, where it can be captured.
What to do
Add `Secure` to the cookie.
asset: https://sproutstudio.com/
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: sproutstudio.com
beta.sproutstudio.com appears in Certificate Transparency logs. Names like this usually front staging, admin, or internal tooling, which tends to be patched later and monitored less than production.
What to do
Confirm this host is meant to be public. If not, put it behind SSO or an allow-list.
asset: beta.sproutstudio.com
Without HttpOnly, any injected script can read and exfiltrate this cookie.
What to do
Add `HttpOnly` unless client-side code genuinely needs to read it.
asset: https://sproutstudio.com/
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: sproutstudio.com
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: sproutstudio.com
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: sproutstudio.com

final https://sproutstudio.com/status 200time 1010msstack cloudflare

✓http:// redirects to https://
✓Strict-Transport-Security
max-age=31536000; includeSubDomains; preload
✓Content-Security-Policy
default-src 'self' http: https: ws: wss: data: blob: 'unsafe-inline' 'unsafe-eval'; frame-ancestors *;
✓Clickjacking protection
DENY
✓X-Content-Type-Options
nosniff, nosniff
✓Referrer-Policy
no-referrer-when-downgrade
✓Permissions-Policy
interest-cohort=()
–security.txt publishedoptional — tells researchers where to report bugs

✗Cookie PHPSESSID
no Secure · no HttpOnly · no SameSite

✓Receives mail via 5 servers
alt1.aspmx.l.google.com alt2.aspmx.l.google.com alt3.aspmx.l.google.com alt4.aspmx.l.google.com+1
!SPFends in ~all
v=spf1 exists:%{i}._spf.sparkpostmail.com ip4:173.236.20.0/24 ip4:192.92.97.0/24 ip4:52.128.40.0/21 ip4:217.8.118.0/24 ip4:103.229.233.0/24 ip4:35.190.247.0/24 ip4:64.233.160.0/19 ip4:66.102.0.0/20 ip4:66.249.80.0/20 ip4:72.14.192.0/18 ip4:74.125.0.0/16 ip4:108.177.8.0/21 ip4:173.194.0.0/16 ip4:209.85.128.0/17 ip4:216.58.192.0/19 ip4:216.239.32.0/19 ip6:2001:4860:4000::/36 ip6:2404:6800:4000::/36 ip6:2607:f8b0:4000::/36 ip6:2800:3f0:4000::/36 ip6:2a00:1450:4000::/36 ip6:2c0f:fb50:4000::/36 ip4:172.217.0.0/19 ip4:172.217.32.0/20 ip4:172.217.128.0/19 ip4:172.217.160.0/20 ip4:172.217.192.0/19 ip4:172.253.56.0/21 ip4:172.253.112.0/20 ip4:108.177.96.0/19 ip4:35.191.0.0/16 ip4:130.211.0.0/22 ~all
✓DMARCp=reject
v=DMARC1; p=reject; rua=mailto:dev+dmarc@sproutstudio.com;
!MTA-STSinbound mail can be downgraded to plaintext

!DNSSECanswers can be forged
–CAAany CA may issue
–IPv6 (AAAA)IPv4 only
✓6 nameservers
ns10.dnsmadeeasy.com ns11.dnsmadeeasy.com ns12.dnsmadeeasy.com ns13.dnsmadeeasy.com ns14.dnsmadeeasy.com ns15.dnsmadeeasy.com

✓Registered with Domain.com - Network Solutions, LLC20.2 years old
sproutstudio.com
✓Registration expiry293 days
2027-06-27
✗Transfer lock
none
✓6 nameservers at registry
ns10.dnsmadeeasy.com ns11.dnsmadeeasy.com ns12.dnsmadeeasy.com ns13.dnsmadeeasy.com ns14.dnsmadeeasy.com ns15.dnsmadeeasy.com

Address	Ports	CVEs	Edge	Network
151.236.16.238 info.sproutstudio.com +3	22804439100	18	direct	—
52.5.164.201 sproutstudio.com +3	80443	0	direct	—
32.198.192.187 sproutstudio.com +4	80443	0	direct	—
23.32.29.9 img.sproutstudio.com +1	80	0	direct	—
96.17.180.42 img.sproutstudio.com +1	80	0	direct	—

Archived URLs

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

sproutstudio.com security report

Elevated

Findings

Security headers

Email authentication

DNS

Registration

Hosts

Hostnames