Access to Vulnerable Ivanti Connect Secure Bookmark Endpoint

The analytic identifies access to a specific Ivanti Connect Secure endpoint, `/api/v1/configuration/users/user-roles/user-role/rest-userrole1/web/web-bookmarks/bookmark`, which is known to be vulnerable to CVE-2023-46805 and CVE-2024-21887. It specifically looks for GET requests that result in a 403 Forbidden HTTP status code with an empty response body. This behavior is indicative of potential exploitation attempts against Ivanti Connect Secure systems. Successful exploitation could lead to unauthorized access or control, potentially resulting in data breaches or system compromise.