Missing HTTPOnly flags on the JSESSIONID cookie in Monitor UI

Currently, the JSESSIONID cookie in Monitor UI doesn't have HTTPOnly flags set. If the HttpOnly attribute is set on a cookie, then the cookie's value cannot be read or set by client-side JavaScript. This measure can prevent certain client-side attacks, such as cross-site scripting, from trivially capturing the cookie's value via an injected script. A malicious client-side code can access the JSESSIONID and hijack active sessions to gain unauthorized access to the application.