This alert is generated during the processing of HTTP requests. Properties that are not in the list of expected properties are ignored by the system during the processing of HTTP requests. After all HTTP parameters have been processed, the system generates this security alert, and lists all unexpected properties.
This alert should only occur during the testing of Pega Web Mashup applications or on Pega Platform web nodes, and is an indication of an attempt to tamper with a URL or browser page. It can also be raised due to an incomplete expected property list.