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'ap-o-burger-menu mainmenuopen' : 'ap-o-burger-menu'" i-amphtml-binding> <ul class="-th"> <li class="-tp"> <label class="ap-o-burger-menu-link -tw "> About </label> <input class="-td" type="checkbox" aria-label="About"> <span class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <ul class="-th"> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/websites/"> AMP Websites </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/stories/"> Web Stories </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/ads/"> AMP Ads </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/email/"> AMP Email </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/how-amp-works/"> How AMP works </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/mission-and-vision/"> Vision & Mission </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/use-cases/"> Use cases </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/success-stories/"> Success Stories </a> </li> </ul> </li> <li class="-tp"> <label class="ap-o-burger-menu-link -tw active"> Documentation </label> <input class="-td" type="checkbox" aria-label="Documentation" checked> <span class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <ul class="-th"> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/"> Get Started </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/guides-and-tutorials/"> Guides & Tutorials </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/components/"> Components </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/examples/"> Examples </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/courses/"> Courses </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/templates/"> Templates </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/tools/"> Tools </a> </li> </ul> </li> <li class="-tp"> <label class="ap-o-burger-menu-link -tw "> Community </label> <input class="-td" type="checkbox" aria-label="Community"> <span class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <ul class="-th"> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/guides-and-tutorials/contribute/"> Contribute </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/community/roadmap/"> Roadmap </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/community/governance/"> Governance </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/community/working-groups/access-subscriptions/"> Working Groups </a> </li> </ul> </li> <li class="-tp"> <label class="ap-o-burger-menu-link -tw "> Events </label> <input class="-td" type="checkbox" aria-label="Events"> <span class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <ul class="-th"> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/events/amp-fest-2020/"> AMP Fest 2020 </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/events/amp-roadshow/"> AMP Roadshow </a> </li> </ul> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tw" href="https://blog.amp.dev">Blog</a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tw " href="/support/"> Help </a> </li> </ul> </nav> <div class="-oc"> <amp-position-observer on="enter:slideTransition.start; exit:slideTransition.start,slideTransition.reverse" intersection-ratios="1" layout="nodisplay" class="i-amphtml-layout-nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"> </amp-position-observer> <amp-animation id="slideTransition" layout="nodisplay" class="i-amphtml-layout-nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"> <script type="application/json">{"duration":"150ms","fill":"both","easing":"ease-out","iterations":"1","animations":[{"selector":".label-title","keyframes":[{"transform":"scale3d(0, 1, 1)"},{"transform":"scale3d(1, 1, 1)"}]}]}</script> </amp-animation> </div> <amp-user-notification class="-fv i-amphtml-layout-nodisplay" id="format-filter-hint" layout="nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"> </amp-user-notification> <div class="-fd" aria-hidden="true"> <div class="-fm"> <div class="-fg">Select your format for a more streamlined experience</div> <button class="-fy" on="tap:format-filter-hint.dismiss"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#close"/></svg> </button> </div> </div> <main class="ap--main -ao"> <div class="-tf"> <input class="-od ap-a-sidebar-mobile-toggle-input-sidebar" type="checkbox" name="sidebar" id="sidebar" autocomplete="off"> <input class="-om ap-a-sidebar-desktop-toggle-input-sidebar" type="checkbox" name="sidebar-desktop" id="sidebar-desktop" autocomplete="off"> <span id="ap--sidebar-content" class="-oy"></span> <section class="ap--toc"> <div class="ap-o-toc" [class]="contentmenuopen ? 'ap-o-toc contentmenuopen' : 'ap-o-toc'" i-amphtml-binding> <label class="ap-o-toc-toggle" for="toc" on="tap:AMP.setState({contentmenuopen: !contentmenuopen})" role="contentmenutrigger" tabindex="0"> <span class="ap-o-toc-hl">Table of contents</span> <span class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> </label> <input class="-oh -of" type="checkbox" name="toc" id="toc" autocomplete="off"> <ul><li><a href="#implement-amp’s-csp">Implement AMP’s CSP</a></li></ul> </div> </section> <section class="-t"> <label class="-op -ol ap-a-sidebar-mobile-toggle-label-sidebar" for="sidebar" on="tap:sidebar-left.toggle" role="categoriemenutrigger" tabindex="0"> <span class="label-icon"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#sidebar-toggle"/></svg></span> <span class="label-title">Toggle Sidebar</span> </label> <label class="-op -og ap-a-sidebar-desktop-toggle-label-sidebar" for="sidebar-desktop" role="categoriemenutrigger-desktop" tabindex="0"> <span class="label-icon"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#sidebar-toggle"/></svg></span> <span class="label-title">Toggle Sidebar</span> </label> <nav class="-ou"> <a class="ap-m-breadcrumbs-crumb" href="/documentation/">Documentation</a> <span class="ap-m-breadcrumbs-divider"> <svg class="ap-a-ico -oa"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <div class="ap-m-breadcrumbs-crumb">Guides & Tutorials</div> </nav> <h1>Secure from third party attacks</h1> <p>Take measures to protect your site and users from security vulnerabilities on the web. One of the most sinister is <a href="https://www.google.com/about/appsecurity/learning/xss/">cross-site scripting</a> (XSS). XSS is a security bug that can allow an attacker to inject malicious code onto the HTML pages displayed to users.</p> <p>Protect against these types of attacks by adopting a <a href="https://csp.withgoogle.com/docs/index.html">Content Security Policy (CSP)</a>. AMP caches like the Google AMP Cache already add CSP to your pages! However, pages lack this additional layer of protection when users circumvent the cached version, if you do not add your own CSP.</p> <h1 id="implement-amp’s-csp">Implement AMP’s CSP</h1> <p>Implement a CSP by adding the appropriate meta tag to the head of your pages. Below is AMP’s CSP, allowing only AMP scripts to be injected into your page:</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">meta</span> <span class="na">http-equiv</span><span class="o">=</span><span class="s">"Content-Security-Policy"</span> <span class="na">content</span><span class="o">=</span><span class="s">"default-src * data: blob:; script-src blob: https://cdn.ampproject.org/v0.js https://cdn.ampproject.org/v0/ https://cdn.ampproject.org/viewer/ https://cdn.ampproject.org/rtv/; object-src 'none'; style-src 'unsafe-inline' https://cdn.ampproject.org/rtv/ https://cdn.materialdesignicons.com https://cloud.typography.com https://fast.fonts.net https://fonts.googleapis.com https://maxcdn.bootstrapcdn.com https://p.typekit.net https://use.fontawesome.com https://use.typekit.net; report-uri https://csp-collector.appspot.com/csp/amp"</span> <span class="p">/></span> </code></pre></div> <p><a href="https://github.com/ampproject/amphtml/blob/main/examples/csp.amp.html">You can view the full example here</a>.</p> <p> </p><div class="ap-m-tip"> <div class="ap-a-ico ap-m-tip-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#bookmark"/></svg> </div> <div class="ap-m-tip-content"> Learn more about <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP">protecting about security vulnerabilities and CSPs here</a>. </div> </div><p></p> </section> <section class="-t"> <hr> <ul class="ap-o-mini-card-list"> <li class="ap-o-mini-card-list-item"> <div class="ap-m-mini-card"> <amp-img alt="Author avatar" src="https://github.com/CrystalOnScript.png?size=38" width="38" height="38" class="large i-amphtml-layout-responsive i-amphtml-layout-size-defined" style="max-width: 38px" layout="responsive" i-amphtml-layout="responsive"><i-amphtml-sizer slot="i-amphtml-svc" style="display:block;padding-top:100%"></i-amphtml-sizer> </amp-img> <span> <strong>Written by <a href="https://github.com/CrystalOnScript" rel="nofollow" target="_blank"> @CrystalOnScript </a> </strong> </span> </div></li> </ul> </section> </div> </main> <amp-sidebar id="sidebar-left" class="ap--ampsidebar i-amphtml-layout-nodisplay" layout="nodisplay" side="left" hidden="hidden" i-amphtml-layout="nodisplay"> <nav class="ap--ampsidebar-toolbar" toolbar="(min-width: 768px)" toolbar-target="ap--sidebar-content"> <ul> <div class="ap-m-format-toggle"> <button class="ap-m-format-toggle-selected ap-m-format-toggle-link-websites"> <span class="ap-a-ico"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-websites"/></svg> </span> <span>websites</span> <span class="ap-a-ico ap-m-format-toggle-angle"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> </button> <div class="ap-m-format-toggle-formats"> <a class="ap-m-format-toggle-link ap-m-format-toggle-link-stories" href="/documentation/guides-and-tutorials/stories/optimize-and-measure/secure-pages/"> <span class="ap-a-ico"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-stories"/></svg> </span> <span>stories</span> </a> <a class="ap-m-format-toggle-link ap-m-format-toggle-link-ads" href="/documentation/guides-and-tutorials/ads/optimize-and-measure/secure-pages/"> <span class="ap-a-ico"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-ads"/></svg> </span> <span>ads</span> </a> <a class="ap-m-format-toggle-link ap-m-format-toggle-link-email" href="/documentation/guides-and-tutorials/email/optimize-and-measure/secure-pages/"> <span class="ap-a-ico"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-email"/></svg> </span> <span>email</span> </a> </div> </div> <div class="ap-o-sidebar-default"> <div class="ap-o-sidebar"> <div class="nav"> <ul class="nav-list level-1"> <li class="nav-item level-1"> <span class="nav-link"> <span>Start</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> <ul class="nav-list level-2"> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/"> <span>Create your first AMP</span> <span class="nav-link-lastword">Page<svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg></span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/basic_markup/"> Starter code </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/include_image/"> Include an image </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/presentation_layout/"> Adding style </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/prepare_for_discovery/"> Plug and play components </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/actions_events/"> Actions and events </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/preview_and_validate/"> Preview and validate </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/publish/"> Keep going </a> </li> </ul> </li> <li class="nav-item-tutorial-divider"></li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/"> <span>Convert HTML to</span> <span class="nav-link-lastword">AMP<svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg></span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/setting-up/"> Setting up </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/building-page/"> Building a regular HTML page </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/resolving-errors/"> Resolving validation errors </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/discoverable/"> Making your page discoverable </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/congratulations/"> Congratulations! </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/"> <span>Add advanced AMP</span> <span class="nav-link-lastword">features<svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg></span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/setting_up/"> Setting up </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/review_code/"> Reviewing the starter code </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/adding_components/"> Adding extended AMP components </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/adding_carousels/"> Adding carousels </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/tracking_data/"> Tracking engagement with analytics </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/navigating/"> Navigating your site </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/fonts/"> Adding fonts </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/congratulations/"> Congratulations! </a> </li> </ul> </li> </ul> </li> <li class="nav-item level-1"> <span class="nav-link"> <span>Learn</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> <ul class="nav-list level-2"> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-actions-and-events/"> Actions and events </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/common_attributes/"> Common element attributes </a> </li> <li class="nav-item level-2"> <span class="nav-link"> <span>AMP HTML Specification</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/spec/amp-boilerplate/"> AMP Boilerplate Code </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/spec/amp-html-responsive-attributes/"> AMP HTML Responsive Attributes </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/spec/amp-video-interface/"> Video in AMP </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/spec/amphtml/"> AMP HTML Specification </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/spec/release-schedule/"> AMP Release Schedule </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/experimental/"> Enable experimental features </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-html-layout/"> <span>AMP's Layout System</span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-html-layout/"> AMPHTML Layout System </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-html-layout/layouts_demonstrated/"> Demonstrating AMP layouts </a> </li> </ul> </li> <li class="nav-item level-2"> <span class="nav-link"> <span>Validation Workflow</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/validation-workflow/validate_amp/"> Validate AMP pages </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/validation-workflow/validation_errors/"> AMP validation errors </a> </li> </ul> </li> <li class="nav-item level-2"> <span class="nav-link"> <span>AMP Caches & CORS</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" 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