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Disallow any domain from embeding a page to prevent clickjacking #322

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Oct 5, 2023
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Disallow any domain from embeding a page to prevent clickjacking #322

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5 changes: 5 additions & 0 deletions lib/govuk_app_config/govuk_content_security_policy.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -80,6 +80,11 @@ def self.build_policy(policy)
# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/frame-src
policy.frame_src :self, *GOVUK_DOMAINS, "www.youtube.com", "www.youtube-nocookie.com" # Allow youtube embeds

# Disallow any domain from embeding a page using <frame>, <iframe>, <object>, or <embed> to prevent clickjacking
#
# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/frame-ancestors
policy.frame_ancestors :none

policy.report_uri ENV["GOVUK_CSP_REPORT_URI"] if ENV.include?("GOVUK_CSP_REPORT_URI")
end

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