Salesforce enable stricter content security policy. This impact can be far-ranging and unexpected.

Salesforce enable stricter content security policy. Check out Mitigate cross-site scripting (XSS) with a strict Content Security Policy (CSP) for more Jul 4, 2025 · Content Security Policy errors and warnings When you see any of the following messages logged in the browser devtools console, it indicates that a problem related to CSP has occurred. For example, it's possible to break an image that's hosted on another domain. You need to identify what sets the CSP with "script-src 'self'" and modify that policy. com can request a resource from https://www. com subdomain that require a secure connection (HTTPS) Setup | Domain Management | Click on Domain Name | Enable Strict Transport Security Headers X-FRAME Options Header Aug 29, 2025 · Content Security Policy (CSP) is a widely supported Web security standard intended to prevent certain types of injection-based attacks by giving developers control over the resources loaded by their applications. Step 3: Select “Header Injection” from the policy categories, select latest version of the policy available and then click “Configure Policy”. Learn what a data security policy encompasses and how to implement it within your organization. The CSP rules work at the page level, and apply to all components and libraries, whether Lightning Locker is enabled or not. Note: To ensure the CSP behaves as expected, it is best to use the report-uri and/or report-to Understand How LWS Architecture Affects Component Performance Debug with LWS Enabled LWS Sanitization Troubleshoot Issues Related to LWS LWS Limitations Lightning Locker Content Security Policy (CSP) JavaScript Strict Mode Enforcement Lightning Web Security (LWS) / Build Components to Work With LWS /Specify a MIME Type for Blob Objects However, Lightning Web Security (LWS) and Lightning Locker implicitly enable JavaScript strict mode everywhere. More details here The Strict-Transport-Security (HSTS) HTTP header is enabled for login. Well-structured and tested policies keep your employees and customers connected, productive, and secure. When configured and enabled, a web server will return the appropriate Content-Security-Policy in the HTTP response header. Jun 16, 2021 · A Content Security Policy (CSP) helps to ensure any content loaded in the page is trusted by the site owner. Use Content Security Policy (CSP) directives to control the types of resources that Lightning components, third-party APIs, and WebSocket connections can load from each trusted URL. The main objective is to help prevent cross-site scripting (XSS) and other code injection attacks. To disable it: From Setup, enter Session in the Quick Find box, and then select Session Settings. Experience Builder sites use Content Security Policy (CSP) and Lightning Locker to secure your site from malicious attacks and custom code vulnerabilities. Nov 30, 2020 · Configuring Content-Security-Policy (CSP) and allowing Google Tag Manager (GTM) scripts can be split into two main parts: Setting GTMs standard tag types. To enable this change for testing, from the Session Settings Setup page, enable Adopt updated CSP directives. To use third-party APIs that make requests to an external (non-Salesforce) server, add the server as a CSP Trusted Site. Content Security Policy (CSP) is a security mechanism that helps prevent cross-site scripting (XSS), clickjacking, and other code injection attacks. Setting GTMs Custom HTML tag types. Read the IETF on HSTS for more information. Comprehensive guide to Content Security Policy (CSP) header with examples and reference for implementing secure web applications. Also, note that using unsafe Data security policies are crucial to combat data threats. 00:00 — Introduction to Part 300:23 — Before you Start00:40 — Finding CSP Truste Learn to write secure code compatible with Content Security Policy. *" - i. This impact can be far-ranging and unexpected. com and force. You may want to read more about CSP on the on the HTML5Rocks website and Mozilla developer page here and here. You can easily switch between levels to test how different security levels affect your customers’ experience. Jul 23, 2025 · What is Content Security Policy (CSP)? Content Security Policy (CSP) is a browser feature that helps mitigate a wide range of attacks by specifying which sources of content are allowed to be loaded on your web pages. This video shows how to update the Content Security Policy in Salesforce CRM. To make sure that your policies remain functional, write and maintain them using these best practices. These new rules are designed to keep your Salesforce environmen The Lightning Component framework uses Content Security Policy (CSP), the W3C standard to control the source of content that can be loaded on a page. With a few exceptions, policies mostly involve specifying server origins and script endpoints. We looked high and low but couldn't find that page. Sep 17, 2021 · Also the Content-Security-Policy-Report-Only is not supported in meta tag. dev/strict-csp. Have you ever … Utilizing CORS and CSP for Accessing APIs in Org admins should enable this setting to protect the org's security controls from vulnerabilities in custom Lightning components. The Lightning Component framework already uses CSP, which is a W3C standard, to control the source of content that can be loaded on a page. Learn how to implement Content Security Policy (CSP) to prevent XSS attacks, clickjacking, and other injection threats. Metering prevents transaction security policy evaluations from using too many resources and adversely affecting your Salesforce org. It’s Mar 23, 2022 · Refused to load script because it violates Content Security Policy directive Ask Question Asked 3 years, 7 months ago Modified 3 years, 7 months ago Jul 17, 2017 · Content-Security-Policy is a security header that can (and should) be included on communication from your website’s server to a client. The Lightning Component framework uses Content Security Policy (CSP), which is a W3C standard, to control the source of content that can be loaded on a page. LWS relies on Stricter CSP to fully implement its security measures. Create a condition "Server Variable" "RESPONSE_CONTENT_SECURITY_POLICY" "match with regular expression" and value ". Use this guide to understand how to deploy Google Tag Manager on sites that use a CSP. The CSP rules work at the page level, and apply to all components and libraries, regardless of whether Lightning Locker or Lightning Web Security are enabled. Further mitigate the risk of cross-site scripting and other code injection attacks by ensuring that the Stricter CSP setting is enabled. CORS defines a way in which the browser and the server can interact to determine whether to allow the cross-origin request. The Enable Stricter Content Security Policy org setting further mitigates the The Lightning Component framework uses Content Security Policy (CSP) to impose restrictions on content. Complete guide with Apache, Nginx, and IIS configurations. , match on any value or a missing value. You don’t need to specify "use strict" in your code. Either the 'unsafe-inl Jun 25, 2025 · Using Content Security Policy (CSP) to control which resources can be loaded and run by a Microsoft Edge extension. CSP is a W3C standard that controls the source of content that can be loaded on your site’s pages and helps protect against cross-site scripting (XSS) attacks. com, select Allow HSTS preloading registration on the domain. Manage Trusted URL and Browser Policy Violations To protect your users, two allowlists specify the URLs that you trust to load resources in Salesforce and the trusted URLs for redirections. Note that stricter CSP is enabled by default beginning with Summer '18, but not in orgs created previously. However, the CSP can easily be bypassed if it is not strict enough. Mar 27, 2023 · 1 You likely have a default Content Security Policy served as a response header. For Adopt Updated Content Security Policy (CSP) Directives, follow the testing and activation steps. The first part will be covered in short notes to provide a handy overview. To configure a CSP, add the Content-Security-Policy HTTP header to a web page and set values that control what resources the user agent can load for that page. Factor in the potential impact of these security features when you develop your own custom components, use third-party components, or add custom code in the head markup. What is CSP (content security policy)? CSP is a browser security mechanism that aims to mitigate XSS and some other attacks. To get real value out of CSP your policy must prevent the execution of untrusted scripts; this page describes how to accomplish this using an approach called strict CSP. The Jul 1, 2024 · HTTP Strict Transport Security (HSTS) Setup | Security Controls | Session Settings | Enable HSTS for all Sites and Communities with the default force. Mar 16, 2022 · When firing an API request from Lightning Web Components (LWC), have you ever run into errors like “Refused to connect because it violates the document’s Content Security Policy” or “Access has been blocked by CORS policy”? In this blog post, we’ll explore the reason behind these errors and how to fix them. SetResponseHeader ("Content-Security-Policy","default-src 'self'"); If you are using image from content builder your header can be like this: Platform. Transaction security policy management isn’t always easy, especially when you have many policies. Oct 31, 2018 · You can disable this. Response. Aura and LWR sites in Experience Cloud use Content Security Policy (CSP) and either Lightning Web Security (LWS) or Lightning Locker to secure the site from malicious attacks and custom code vulnerabilities. It works by allowing you to specify which resources (scripts, styles, images, etc. When a user goes to your website, headers are used for the client and server to exchange information about the browsing session. To help you adopt this change, Salesforce plans to improve the reporting Cross-Origin Resource Sharing is a browser technology specification that defines ways for a web server to allow its resources to be accessed by a browser application from a different origin domain. Learn how to increase app security using Lightning Web Components (LWC), apply best practices, and migrate from Aura to LWC efficiently. Jun 27, 2025 · Content Security Policy (CSP) is a security feature implemented by web browsers that helps to protect against attacks such as cross-site scripting (XSS) and data injection. You can choose whether functional and advertising cookies apply. While implementing Personalization on your website using Interactions SDK and Web Personalization Manager (WPM), you must configure certain CSPs to ensure secure and seamless functionality. This documentation is outdated and available for historical reasons only. Have you encountered issues such as “Refused to connect because it violates the document’s Content Security Policy” or “Access has been blocked by CORS policy” when making API requests from Lightning Web Components (LWC)? In this article, we will delve into the causes of these errors and provide solutions to resolve them. If you're already using unsafe-eval elsewhere, you don't have to immediately stop using it. Adopting a strict policy To enable Enable and Configure Mobile App Security Policies Use the convenient Setup UI to enable, configure, and enforce mobile security policies. Apr 19, 2023 · The code from the documentation is just an example of header, if images or CSS are on your page then you need to update this header to accept it. CSPs mitigate cross-site scripting (XSS) attacks because they can block unsafe scripts injected by attackers. For all other sandboxes and Developer Edition orgs, stricter CSP is disabled by default. So the issue is with this header : Platform. Salesforce isn’t enforcing the Adopt updated CSP directives setting at this time. Unsupported Browsers Arrays Proxied When Passed to Child Components querySelector APIs With Lightning Locker Select the Locker API Version for an Org Disable Lightning Locker for an Aura Component Access to Supported JavaScript API Framework Methods Only Content Security Policy (CSP) JavaScript Strict Mode Enforcement Lightning Locker /MIME Mar 20, 2019 · I am setting up a content security policy (CSP)for my website. Then in the action section choose Replace, and put the CSP header value you Change to Device Activation Behavior Read MoreTable of Contents Jun 28, 2024 · Salesforce documentation provides following example of the security header related code to be added in content page. The Content-Security-Policy sometimes breaks external content when applied to view domains. Use data gathered in Security Center to identify settings that matter most to you. Developers select which headers to apply from these nine options. However, the main concern of this article is the second part, as it is a bit more tricky to set. Discover how to implement effective access control and encryption to protect public sector data. 2 days ago · The HTTP Content-Security-Policy response header allows website administrators to control resources the user agent is allowed to load for a given page. The “Enable Stricter Content Security Policy” org setting was added in the Winter ’19 release to further Content Security Policies (CSP) help secure web applications by limiting loadable and executable JavaScript resources. Important See Also Enable and Disable LWS in Scratch Orgs Salesforce Help: Lightning Web Security FAQ j Get Started Lightning Web Security (LWS) How LWS Works Determine if LWS Affects Your Org When to Enable LWS Jan 5, 2018 · Salesforce Update Description This critical update enables stricter Content Security Policy (CSP) in sandboxes and Developer Edition orgs for Lightning communities only. Jul 1, 2024 · HTTP Strict Transport Security (HSTS) Setup | Security Controls | Session Settings | Enable HSTS for all Sites and Communities with the default force. Enhance safety against XSS, clickjacking, and other web threats. Then, to allow the required resources, update your trusted URLs. Adding another policy in meta tag can only make it stricter as all content needs to pass all policies. Exempt Users from Transaction Security Policies If you have transaction security policies that work well for most users, but not all, you can assign specific users the Exempt from Transaction Security user permission. salesforce. It allows web developers to specify which sources of content are trusted and can be loaded or executed by the web application. By defining a strict CSP, developers can mitigate the risk of malicious code being injected and executed in the context May 23, 2025 · Content Security Policy (CSP) is a powerful security mechanism designed to mitigate web-based attacks such as Cross-Site Scripting (XSS) and data injection. Note, this seems to make lightning:container operate in an even MORE strict setting than components outside of a container and also ignores CSP whitelist in Salesforce Setup (wut?). HTTP Strict Transport Security (HSTS) secures your site by instructing web browsers to access your domain using only HTTPS. Lightning Locker prevents accessing iframe content even from the same origin. Jul 1, 2022 · Refused to load the script as it violates content security policy while working on LWC file Ask Question Asked 3 years, 4 months ago Modified 3 years, 4 months ago Aug 17, 2023 · Add server variable RESPONSE_CONTENT_SECURITY_POLICY. Such access would otherwise be forbidden by the same origin policy. How to fix 'because it violates the following content security policy directive'. If you enabled the Permissions-Policy HTTP header in Session Settings, you can also control which URLs can access browser features from Salesforce. Deselect the checkbox for “Enable Stricter Content Security Policy”. Step 4: Add below key value pair in the “Outbound Header Map” and then click Apply. Aug 8, 2017 · The Lightning Component framework uses Content Security Policy (CSP), which is a W3C standard, to control the source of content that can be loaded on a page. I have been using it for a few websites for the last weeks without any issue. Enable Stricter Content Security Policy (CSP) The Lightning Component framework uses CSP to control the source of content that can be loaded on a page, regardless of whether LWS or Lightning Locker is enabled. HTTP Strict Transport Security (HSTS) HSTS is enabled for login. We recommend running Strict CSP for optimum security. For pages that Salesforce serves, clickjack protection is implemented through the Content Security Policy (CSP) frame-ancestors HTTP response header directive. . To learn how to enable strict Content Security Policy in your application, visit web. Jun 15, 2012 · Content Security Policy can significantly reduce the risk and impact of cross-site scripting attacks in modern browsers. Starting with Salesforce’s Spring '25 release, stricter Content Security Policy (CSP) directives will be enforced on Lightning Pages. Review blocked redirections and the resource requests that your content security policy (CSP) directives blocked. CSP is a W3C standard that defines rules to control the source of content that can be loaded on a page. Selecting a security level depends on your needs and tolerance for risk. Key: "Strict-Transport-Security Value: “max-age=86400; includeSubDomains” We use three kinds of cookies on our websites: required, functional, and advertising. This articles covers Content Security Policy and how to add resources to a policy Jun 30, 2017 · Stricter CSP is enabled by default for sandboxes and Developer Edition orgs that have previously enabled the “Enable Lightning LockerService Security” critical update. However, to help protect your org from cross-site scripting and other code-injection attacks, we continue to encourage you to enable that setting now. The Lightning Component framework uses Content Security Policy (CSP), which is a W3C standard, to control the source of content that can be loaded on a page. Use this topic as a starting point to understand all the security improvements and updates, including timelines for enforcement and how to prepare for the changes. Learn how to use script and style nonces in Content Security Policy (CSP) for secure web development. HSTS prevents attackers from using downgrade attacks against your site. If your domain in Salesforce is a registrable domain such as https://example. PasswordPolicies Represents your org’s password and login policies, which show up under Security Controls | Password Policies. Dec 7, 2024 · The Content-Security-Policy header enforces the policy and blocks any violations. com subdomain that require a secure connection (HTTPS) Setup | Domain Management | Click on Domain Name | Enable Strict Transport Security Headers X-FRAME Options Header Dec 18, 2018 · How to define a Content Security Policy (CSP) that utilizes 'strict-dynamic' but includes fallback to use 'unsafe-inline'? Asked 6 years, 10 months ago Modified 5 years, 6 months ago Viewed 7k times Content security policy In this section, we'll explain what content security policy is, and describe how CSP can be used to mitigate against some common attacks. This update enables stricter CSP to mitigate the risk of cross-site scripting attacks. Guest User Security Policies and Timelines To improve data security for orgs with guest users, Salesforce made some security improvements. Define and Deploy Security Policies You can define security-related policies and deploy them to the tenants that you choose. Refused to run the JavaScript URL because it violates the following Content Security Policy direc Sep 13, 2024 · Content Security Policy (CSP) is an added layer of security that helps to mitigate XSS. Develop and test your code with stricter CSP enabled in order to ensure compatibility. Required EditionsUser Permissions NeededTo create and modify Enhanc When you enable CSP, it will block inline styles, but there are some ways that you can allow inline styles and still use Content Security Policy. To enable strict Content Security Policy (CSP), certain browser features are disabled by default. com. Enable Stricter Content Security Policy for Lightning Components Enable Stricter Content Security Policy for Lightning Components in Communities This gives you more time to update your code to work with stricter CSP. This is the recommended way to use CSP. e. It works by restricting the resources (such as scripts and images) that a page can load and restricting Strict CSP Content Security Policy can help protect your application from XSS, but in order for it to be effective you need to define a secure policy. Follow step-by-step instructions using Condition Builder. Then add a blank outbound rule and give it a name. ) your browser should be allowed to load Learn how to enable and create transaction security policies to protect your organization. It limits the sources from which content can be loaded on a web page. Follow these steps: Stricter CSP is enabled by default. To review this update, from Setup, in the Quick Find box, enter Release Updates, and then select Release Updates. com, MyDomains, on Lightning + content domain, VisualForce, Communities subdomain and on the non-community, Sites subdomain. Dec 4, 2024 · Content Security Policy (CSP) is a security feature implemented by web browsers to protect against attacks such as cross-site scripting (XSS) and data injection. Click Save. your site has a pre-existing Content Security Policy you're using web templates and have the Handlebars Gear enabled you haven't already included the unsafe-inline directive in your Content Security Policy. When LWS is enabled, we strongly advise that you keep the Enable Stricter Content Security Policy setting enabled. When I Scan through https Configure Salesforce CORS Allowlist Cross-Origin Resource Sharing (CORS) allows web browsers to request resources from other origins. If you are looking to integrate salesforce into your organization, Hexaview is there for you. The Adopt Updated Content Security Policy (CSP) Directives release update is canceled. To allow access to supported Salesforce APIs, Apex REST resources, and Lightning Out from JavaScript code in a web Jan 23, 2024 · I'm currently implementing Content Security Policy (CSP) on my web application, and I've encountered an issue with the 'require-trusted-types-for' directive. Enhance your security measures in cloud environments. The following table lists the ServiceMax assessment status for the Salesforce release updates for the 2025 releases. Jun 30, 2025 · 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 setting mitigates the risk of cross-site scripting attacks and is enabled by default. How to use the CSP frame-ancestors directive in a Content-Security-Policy header to allow or block the page from being loaded within frames or iframes. This helps guard against cross-site scripting attacks. I am using ringcentral salesforce integration when i click on (click to dial) it is not working. CSP and Lightning Locker Design Considerations Whether you’re an administrator, content manager, or developer, be aware of the impact of the different security levels on your Experience Builder site. Use the convenient Setup UI to enable, configure, and enforce mobile security policies. Salesforce enabled Strict CSP Security settings by default for new Lightning Communities. What is the Content Security Policy ? How does it work ? Content Security Policy is a crucial security standard that helps protect your web applications from various types of attacks, including Cross-Site Scripting (XSS), clickjacking, and other code injection attacks. Tools for LWS Considerations Before Using LWS-Only Features Experience Builder Sites and LWS Build Components to Work With LWS Debug with LWS Enabled LWS Sanitization Troubleshoot Issues Related to LWS LWS Limitations Lightning Locker Content Security Policy (CSP) JavaScript Strict Mode Enforcement Lightning Web Security (LWS) /How LWS Works The frame-ancestor directive indicates that only salesforce. For example, using CORS, the JavaScript for a web application at https://www. For extra security, enable preload, which forces web browsers to open your site in HTTPS the first time it's requested. Click on the different cookie categories to find out more about each category and to change the default settings. com, MyDomain login URLs, on Lightning + content domains, VisualForce, and all system-managed domains for Experience Cloud sites and Salesforce Sites. When Lightning Web Security (LWS) is enabled, Lightning components can access content in iframe elements when the content is from the same origin. The Content-Security-Policy-Report-Only header generates reports of violations without blocking any content. This error occurs due to Salesforce’s strict Content Security Policy (CSP) settings, which restrict which domains are allowed to embed its content within an iframe. Go Home Jan 10, 2023 · This post will explain where to set up your CSP in Salesforce and how to allow the third-party domains needed to make advanced forms to operate inside a community. This value provides the greatest security, because content can be loaded only from the Lightning domain. In SPA (Single Page Application), a meta tag is traditionally used for CSP delivery, because a lot of hostings do now allow to manage of HTTP header. SetResponseHeader ("Content-Security May 24, 2023 · The customer reported "Potentially insecure policy; Ineffective headers: Content-Security-Policy, Set-Cookie" for our Community Customer Support portal Site URL. example. External scripts and various other things I have success Enable HSTS preloading on the Strict-Transport-Security HTTP header for your custom domain’s registrable domain. In the context of DevSecOps, where security is integrated into every phase of the software development lifecycle, CSP plays a critical role in ensuring secure application delivery. com should include an IFRAME of Salesforce services. Available Headers The HTTP Security Headers API supports a discrete set of header and value pairs. It is designed to protect your site from various forms of malicious activity, particularly XSS attacks, where malicious scripts are injected into web pages to steal sensitive The CSP level of all pages is now set to high. May 11, 2019 · Anybody knows why am I keep getting this message? Refused to run the JavaScript URL because it violates the following Content Security Policy directive: "default-src 'self'". dvbg3 gnk wadlz nfjhqv eiyf unoyu fpvo hmt eyy 1gwh0