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Last fetched: 2019-06-12T09:16:16.288625+00:00
HTTP status: 5 Sub-resource URL
Fuzzy content type guessing is disabled+1
A non-standard but widely accepted header introduced originally by Microsoft to disable "content sniffing" or heuristic content type discovery in absence or mismatch of a proper HTTP
Content-Type declaration, which led to a number of web attacks. In general, presence of the header with its only defined value of
nosniff is considered as part of a properly secured HTTP response.
The header reduces exposure to Adobe Flash based XSS and does not have side effects, so it is worth setting it to
none if you are not using Flash
Header used by Adobe Flash engine to control cross-site access for Flash applications. Most websites not using Flash would prefer to set it with the value of
none as an additional precaution against using them in advanced Flash-based XSS vectors. Flash-serving websites can use them to declare the scope of detailed Flash cross-site policies per Adobe specification.
Feature-Policy: accelerometer 'none'; camera 'none'; geolocation 'none'; gyroscope 'none'; magnetometer 'none'; microphone 'none'; payment 'none'; usb 'none'
Allows web developers selectively enable and disable specific web technologies, especially those that enable two-way communication between the user and web application. For example, the header may inform the user mobile device that the website is not using camera or location tracking by design.Read more...
The Referrer-Policy HTTP header governs which referrer information, sent in the Referer header, should be included with requests made.Read more...
Strict-Transport-Security: max-age=31536000; includeSubDomains
HTTP Strict Transport Security is enabled+2
HTTP Strict Transport Security (HSTS) is an opt-in security enhancement that is specified by a web application through the use of a special response header.Read more...
X-XSS-Protection: 1; mode=block
XSS auditor is enabled in blocking mode+1
Controls an Cross-Site Scripting (XSS) filters built into the majority of web browsers. The filter is usually turned on by default anyway, but requirement to set the header to
1 became part of canonical set of "secure" HTTP headers. Over time, vulnerabilities in the "sanitizing" mode filter were found, so
1; mode=block became the recommended value. Some companies decided that they don't really need a browser-side XSS filter to mess with their web services which are XSS-free anyway and they became consciously disabling the XSS filter by setting the header to
Clickjacking protection is enabled+2
Instructs the browser if the current website can be embedded in HTML frame by another website. Since this allows the parent website to control the framed page, this creates a potential for data theft attacks ("clickjacking") and most sensitive websites won't allow them to be framed at all (
deny) or just allow parts of them to be embedded in frames created by themselves only (
Announces web server software and optionally version details.Read more...
The HTTP Location header is being returned by a server to redirect the web browser to a new URL of the requested resource. The URL may be relative (
/index.html) or absolute (
Transport Layer Security (TLS) is enabled+2
default-src 'none'; connect-src *; font-src *; frame-src *; img-src * data:; media-src *; base-uri 'self';form-action 'self';frame-ancestors 'self';object-src 'none'; script-src * 'unsafe-inline' 'unsafe-eval'; style-src * 'unsafe-inline';
block-all-mixed-content directive if your website is only accessible over TLS and you are certain it doesn not have any legacy plaintext resources. Otherwise you may add adding
upgrade-insecure-requests directive if your website may still have some legacy plaintext HTTP resources and you want them to be still available rather than blocked
img-src data: origin allows bypassing CSP and execution of inlined untrusted scripts
You should definitely try using
'strict-dynamic' to eliminate those long lists of trusted third-party scripts
script-src 'report-sample' as it significantly helps debugging CSP reports. See specification
script-src 'unsafe-inline' allows bypassing of CSP and execution of inlined untrusted scripts. Use
script-src 'unsafe-eval' allows bypassing of CSP and execution of inlined untrusted scripts. Use
style-src 'unsafe-inline' allows bypassing of CSP and execution of inlined untrusted scripts. Use