None of the response paths in internal/web/ or internal/api/ set the standard browser-security headers. grep for Content-Security-Policy, X-Frame-Options, Strict-Transport-Security, X-Content-Type-Options, Referrer-Policy returns zero matches across the codebase.
The admin UI signs CA certificates, mints API keys (returned inline once per page), displays TOTP QR codes, and exposes operator-management forms. Missing X-Frame-Options: DENY / frame-ancestors 'none' is a real clickjacking lever against an admin browsing /ui/operators/* or /ui/cas/*. Missing X-Content-Type-Options: nosniff allows MIME confusion on any user-supplied content surface. Missing HSTS on TLS deployments leaves a downgrade window.
All released versions up to v0.3.0.
A single response-header middleware mounted at the chi router root in both /ui/* and /api/* paths:
func securityHeadersMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
h := rw.Header()
h.Set("Content-Security-Policy",
"default-src 'self'; frame-ancestors 'none'; base-uri 'none'; form-action 'self'")
h.Set("X-Content-Type-Options", "nosniff")
h.Set("Referrer-Policy", "same-origin")
h.Set("X-Frame-Options", "DENY") // belt-and-braces; CSP frame-ancestors is the modern path
if r.TLS != nil {
h.Set("Strict-Transport-Security", "max-age=31536000; includeSubDomains")
}
next.ServeHTTP(rw, r)
})
}
The inline <script> in layout.html for CSRF wiring (added in the CSRF advisory) will need either a nonce, a hash in CSP, or external-file extraction. Easiest path: a nonce per request (crypto/rand, base64) injected into both the CSP header and the script's nonce="" attribute.
A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.
A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.
Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.
Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.
SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.