What are the security issues with AJAX?
As with any software and application, AJAX also has certain security issues present which could lead to concern down the line. The primary concern is the fact that AJAX calls are sent in plain text format. Hence, it could lead to an insecure database access.
Another concern is the fact that with AJAX the data gets stored on the clients browser, which can possible be access by anyone. Ajax also allows monitoring browsing sessions by inserting scripts, which can also be a concern.
Ajax may also encourage developers to use multiple server side pages thereby introducing multiple entry points for attackers.