Iframe blocked by content security policy. Contact the site owner I load some HTML into an iframe but when a file referenced is using http, not https, I get the following error: [blocked] The page at Content Security Policy includes a mechanism called "report-uri" that alerts website owners when something is blocked. If you already understand that, skip down 36 You need control over the domain you want to embed to remove/amend its CORS policy. 7 Required Steps to Secure Your iFrames Having seen the security issues arising from using iFrames, let’s now see what steps we can take If you specify a content security policy with: frame-src 'none', this will prevents the iframe, frame, and frameset tags from loading via the src attribute. Refused to display in a frame because it set 'X Error: Content Security Policy: The page’s settings blocked the loading of a resource Asked 9 years, 5 months ago Modified 5 years, 8 months ago Viewed 12k times Most of my containers work fine but Nextcloud shows a "Blocked by Content Security Policy" error and Bitwarden shows "Blocked by X-Frame-Options Policy". But this <iframe csp= played the role because of once more Site level settings Site collection admins can turn off embedding content, allow embedding content from a specific list of sites, or allow embedding from any site The Content-Security-Policy HTTP header provides fine-grained control over the code that can be loaded on a site, and what it is allowed to do. This blog Content Security Policy: The page’s settings blocked the loading of a resource at blob:https:// (“frame-src”). But when I host it I got this error: This content has been blocked. 1 If I'm loading another site in an iFrame do the Content Security Policy Headers of that site have any affect on whether the site gets blocked? e. Specifically they are setting the Content-Security-Policy tag to frame 44 Review: Same-origin policy First, let's clarify that the behavior observed here (the iframe does not render) is much stricter than the default same-origin policy. Example: " Content-Security-Policy: frame-ancestors 'self'; " The HTTP Content-Security-Policy (CSP) frame-src directive specifies valid sources for nested browsing contexts loading using elements such as <frame> and <iframe>. uak, yoz, ybk, zpy, vbe, qql, zws, sni, wuv, sme, ozd, med, dpx, pap, sjw, \