85
calendly.com
Findings
6
·
1
·
1
Checks
8 passive
Executive Summary
AI-GENERATED
calendly.com scored 85/100, demonstrating a strong security posture. Minor improvements are noted below.
Critical gaps in: Security Headers. Positive signals: TLS Configuration, DNS Configuration, Known Breaches all passed.
2 action items identified, including 0 critical. The issues are configuration gaps, not architectural problems. A focused remediation effort of 2–5 days could address all findings.
Action Items
Ordered by priority · 2 items
1
Add missing security headers (CSP, X-Frame-Options, Referrer-Policy, Permissions-Policy)
4 of 5 recommended security headers are missing on calendly.com: CSP, X-Frame-Options, Referrer-Policy, Permissions-Policy. These headers protect against clickjacking, MIME-sniffing, and unauthorized browser feature access. Adding them is a server configuration change with no application code changes required.
Compliance Impact
PCI-DSS 4.0Req 6.4.1
Security headers are required application controls
OWASPSecure Headers
Recommended baseline for web applications
Remediation Steps
1
Add Content-Security-Policy header (start with report-only to avoid breakage)
2
Add: X-Frame-Options: DENY (or SAMEORIGIN if you use iframes)
3
Add: Referrer-Policy: strict-origin-when-cross-origin
4
Add: Permissions-Policy: camera=(), microphone=(), geolocation=()
5
Verify with: curl -sI https://calendly.com | grep -iE 'content-security|x-frame|x-content|referrer|permissions'
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2
Review certificate configuration
Certificate issues found for calendly.com: wildcard certificate in use. Wildcard certificates have a broader blast radius if compromised. These are operational hygiene items, not immediate security risks.
Remediation Steps
1
Consider replacing wildcard cert with individual certs for critical subdomains
2
Consolidate certificate issuance to 1–2 trusted CAs
Scan Findings
Security Headers
Critical
Certificate Hygiene
Warning
TLS Configuration
Healthy
DNS Configuration
Healthy
Known Breaches
Healthy
DMARC / Email Security
Healthy
CVE Exposure
Healthy
HSTS Header
Healthy