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Based on your requirement, you need to implement security measures that prevent any logged-in user from simply changing the URL parameter to access cases they shouldn't be able to view. Here's a comprehensive approach to solve this issue:

Server-Side Validation (Primary Security Layer)

The most effective way to secure case access is through server-side validation that occurs regardless of how the case is accessed:

1. Configure Access Control Policies: Set up access control policies at the case type level that validate if a user is a case party before displaying any case details.
2. Implement Case Party Validation: When a request comes in with a CaseID parameter, the server should automatically check if the logged-in user is actually listed as a party to that specific case before processing the request.
3. Attribute-Based Access Control (ABAC): Implement property-level security using ABAC to enforce data-level security that restricts access based on the user's relationship to the case.

Client-Side Implementation in React SDK

In your React SDK component, you should implement additional validation:

const CaseDetails = ({ caseId }) => {

  const [isAuthorized, setIsAuthorized] = useState(false);

  const [caseDetails, setCaseDetails] = useState(null);

  const [error, setError] = useState(null);

  useEffect(() => {

    // Validate the caseId parameter

    if (!caseId) {

      setError("Invalid case ID");

      return;

    }

    // Call the Pega API with proper authentication

    fetchCaseDetails(caseId)

      .then(response => {

        // Server should return authorization status along with case details

        // if the user is authorized

        if (response.isAuthorized) {

          setIsAuthorized(true);

          setCaseDetails(response.details);

        } else {

          setIsAuthorized(false);

          setError("You are not authorized to view this case");

        }

      })

      .catch(err => {

        setError("Error fetching case details");

        console.error(err);

      });

  }, [caseId]);

  // Render based on authorization status

  if (error) return <div className="error-message">{error}</div>;

  if (!isAuthorized) return <div className="unauthorized-message">Access Denied: You are not authorized to view this case.</div>;

  if (!caseDetails) return <div className="loading-message">Loading...</div>;

  return (

    <div className="case-details">

      {/* Render case details */}

      <h1>{caseDetails.caseTitle}</h1>

      {/* Other case information */}

    </div>

  );

};

Security Flow Diagram

Here's a diagram that illustrates the security flow for case access control:

Additional Security Measures

1. Configure Mashup Security Settings: Ensure you've defined trusted origins in your Pega application:
   • In Dev Studio, navigate to Application name > Definition
   • Click the Security tab
   • In the Mashup security section, add your trusted domains
2. URL Parameter Encoding and Validation: Consider encoding or encrypting the CaseID parameter to make it more difficult to manipulate.
3. Implement Token-Based Authorization: Use tokens that include both the user ID and case ID, signed with a secret key, to ensure that the request is legitimate.
4. Audit and Monitor Access Attempts: Implement logging for unauthorized access attempts to detect and respond to potential security incidents.

Implementation Steps

1. First, ensure your access control policies are properly configured to restrict case access to case parties.
2. Modify your server-side API endpoint that fetches case details to validate if the requesting user is a case party before returning any data.
3. Implement the client-side validation in your React SDK component as shown above.
4. Test thoroughly by attempting to access cases both as authorized and unauthorized users.

This multi-layered approach ensures that even if someone manipulates the URL, they still won't be able to access case details unless they're actually a party to the case. The server-side validation is particularly crucial as it provides security regardless of how the request is made.

References:

• Security for Reactive-UI applications
• Access control in Pega
• Securing your application for mashup communication
• Authentication in mashups
• Securing Case access