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www.mayoclinic.org
Is www.mayoclinic.org Safe? Security Score 80.7/100 | CyStack
www.mayoclinic.org
Access Denied
mayo clinic is a top-ranked hospital in the u.s., with campuses in arizona, florida, and minnesota
Industry
Health / Medicine
Origin
United States
Global rank
#1,329
Rank in United States
#471
Updated at
B80.7/100
Security level
Good
Data confidence
High
Scope checked
100%
The higher the score, the more externally observable protections the system has recorded. This page does not certify that the website is reputable, legitimate, or completely free of vulnerabilities.
Is the website “www.mayoclinic.org” safe?
As of August 28, 2026 at 13:01, www.mayoclinic.org has a security score of 80.7/100 (grade B – “Good”). CyStack’s automated assessment recorded 13 issues to review after completing 100% of applicable checks. The website owner should address “Allowed browser content (CSP)” first, then review the remaining items in order of impact.
Does www.mayoclinic.org show known scam, phishing, or malware signals?
At assessment time, CyStack did not find www.mayoclinic.org or related infrastructure on any scam, phishing, or malware warning list after checking 5 online reputation sources. This result reflects external observations; it does not guarantee absolute safety or verify the organization’s legal status or reputation.
Potentially exposed domain email addressesChecks infostealer data for email addresses ending in @mayoclinic.org, the registered domain of the assessed website www.mayoclinic.org. A record is not counted merely because someone visited or signed in to the website.3 Matching email exposure records
3Matching email exposure records
1Related infected devices (estimated)
These matching email records were observed previously, but they may already have been addressed or may no longer be valid. The device count estimates infected devices associated with these email records; it is not the number of devices owned by the organization.
Frequently asked questions
What affects the security of www.mayoclinic.org?
A valid SSL certificate still does not prove that www.mayoclinic.org is safe, legitimate, or free of scam signals. For a more complete assessment, this report also checks phishing and malware, exposed email records, IPs and open ports, subdomains, technologies, and CVEs that may apply to observed versions.
Does www.mayoclinic.org use HTTPS, and is its SSL certificate valid?
www.mayoclinic.org used a valid SSL certificate at assessment time, valid until February 24, 2027. This status may change when the certificate expires or the server configuration changes.
Have @mayoclinic.org email addresses appeared in exposed data or information-stealer (infostealer) logs?
Data sources
Data compiled from CyStack cybersecurity monitoring systems
CyStack compiles scan results from its internal cybersecurity monitoring systems, including CyStack VulnScan and CyStack Threat Intelligence, together with publicly available Internet data. The assessment only observes and analyzes information already available; it does not attempt unauthorized access, test passwords, send exploit code, or change or disrupt the assessed system.
These 3 failed checks or warnings have the greatest impact on the result for www.mayoclinic.org.
Allowed browser content (CSP)The inspected root HTML response does not include a Content-Security-Policy header.High
Why it matters
Content Security Policy (CSP) limits where scripts, styles, frames, and other browser content may come from. A strong policy reduces the impact if an attacker manages to inject content into a page.
What to do
Define only the sources the application needs, test the policy before activating it, and avoid broad wildcard (*) rules, unsafe-inline, and unsafe-eval where possible.
Scope of this check
This check only evaluates the homepage response and content that the scanner could reach. Other pages and sign-in flows may use different settings.
Cross-site access rules (CORS)The root CORS policy is broader than necessary and should be reviewed.High
Why it matters
Cross-Origin Resource Sharing (CORS) decides which websites may read responses from this service in a visitor's browser. Rules that trust arbitrary origins, especially with login cookies, can expose private data to another website.
What to do
Allow only explicitly trusted websites, compare the Origin value with an exact approved list, and never allow login credentials with the wildcard origin (*).
DMARC blocking policyThe effective DMARC policy is none and applies to 100% of messages.High
Why it matters
A policy of quarantine or reject tells receiving services to move suspicious mail to spam or refuse it. A monitoring-only policy (p=none) records the problem but does not ask receivers to stop spoofed mail.
What to do
After every legitimate sender passes DMARC, move gradually to quarantine and then reject, covering 100% of messages.
Evidence and check scope
Leak evidenceMost recent observation:
Email addressRelated infected deviceInfection evidenceRecorded time
Email addressJ*********@mayoclinic.orgRelated infected deviceNo safely shareable device details are available for this record.IOC reference: IOC-818864C442Infection evidenceStealCRecorded timeEmail addressA*****@mayoclinic.orgRelated infected deviceNo safely shareable device details are available for this record.IOC reference: IOC-818864C442Infection evidenceStealCRecorded timeEmail addressR*******@mayoclinic.orgRelated infected deviceNo safely shareable device details are available for this record.IOC reference: IOC-818864C442Infection evidenceStealCRecorded time
Discovered subdomains (376+)Subdomains of mayoclinic.org, the registered domain of the assessed website www.mayoclinic.org. Sensitive-looking names are shown first; individual subdomains have not been separately security-tested.Partial
admin.clearapproach.mayoclinic.orgSensitive-lookingAdmin system
admin.menshealth.mayoclinic.orgSensitive-lookingAdmin system
Public web contextThe website title, description, industry and popularity.
Page title
Access Denied
Website category
Health / Medicine
Description
mayo clinic is a top-ranked hospital in the u.s., with campuses in arizona, florida, and minnesota
Global rank
#1,329
Rank in United States
#471
Rank in industry
#3
Final URL
https://www.mayoclinic.org/
Website rankings and industry category are based on data from Similarweb
This is a quick, point-in-time check from outside the organization. It can surface visible risks, but it does not replace penetration testing or an authenticated assessment.
There are currently 3 exposed email records matching the mayoclinic.org domain. These records may be old or already resolved. The website owner should verify them before resetting passwords or locking related accounts.
Which public IPs, services, and ports does www.mayoclinic.org expose?
The assessment observed 1 public IPs and 2 open ports for www.mayoclinic.org. An open port is not the same as a vulnerability, but the website owner should keep every public service updated and appropriately restrict access.
How many subdomains of mayoclinic.org have been discovered?
The assessment observed 376+ public subdomains of mayoclinic.org. This list can reveal additional entry points such as APIs, administration systems, or test environments, but it does not mean that every subdomain is risky.
Industry
Updated at 
United States
