FAQ-001567 - Rich Text and Code Editor Security / Salesforce-Specific Implementation Security

To securely implement a rich text or code editor within a Visualforce page or Lightning component, follow these best practices: 1. **Sanitize User Input**: Always sanitize user-provided data before rendering it in the editor to prevent cross-site scripting (XSS) attacks. Use encoding functions like `HTMLENCODE`, `JSENCODE`, or `JSINHTMLENCODE` in Visualforce, and sanitize attributes in Lightning components. 2. **Avoid Unescaped Output**: Do not use the `escape="false"` attribute in Visualforce unless absolutely necessary. If you must use it, ensure the output is properly encoded in the controller. 3. **Use Static Resources**: Load third-party libraries or stylesheets required for the editor from static resources instead of external URLs to comply with Salesforce's security policies. 4. **LockerService Compliance**: For Lightning components, ensure compatibility with LockerService by avoiding unsafe attributes and including all scripts in static resources. 5. **Restrict Dangerous Attributes**: Avoid binding user-controlled data to unsafe attributes like `href`, `src`, or `iframe`. If necessary, sanitize these values in the controller or renderer. 6. **Enable CSP**: Follow Content Security Policy (CSP) guidelines to block unsafe inline scripts and styles. However, do not rely solely on CSP as a substitute for secure coding practices. 7. **Avoid Inline JavaScript**: Do not include inline JavaScript within the editor. Use external scripts stored in static resources and review them for security. 8. **Validate and Encode Data**: Validate and encode data when passing it between the server and client to prevent injection attacks. Use secure filters or libraries for encoding. By adhering to these practices, you can mitigate security risks and ensure a secure implementation of a rich text or code editor.