Broken Access control (BAC) refers to all access control issues in web applications that allow end users to gain unauthorized access to privileged data and functionality. Open Web Application Security Project (OWASP) identifies BAC as one of the top 10 security vulnerabilities. BAC usually occurs when users can bypass access control checks by leveraging vulnerabilities such as uniform resource locator (URL)-based requests that do not verify user privileges.

In the 8.3 release, Pega Customer Service for Healthcare has modified the rules that call secured activities in the Pega Platform. The query strings and parameters in the calls are registered so that they cannot be tampered with by the end users.

For more information about the enhancements to prevent Broken Access Control (BAC), and to see a list of rules that were modified for all Pega Customer Service applications, see Pega Customer Service enhancements to prevent Broken Access Control.

The following list shows the modified rules for Pega Customer Service for Healthcare. If you have overridden any of these rules in your Pega Customer Service for Healthcare implementation layer, you need to update them with the changed rules. Run the Pre-Upgrade Checker to identify which of these changed rules are overridden in your implementation layer. For information about the Pre-Upgrade Checker, see the Pega Customer Service for Healthcare and Pega Sales Automation for Healthcare Upgrade Guide on the Pega Customer Service for Healthcare product page.