Burp Repeater is a simple tool for manually manipulating and reissuing individual HTTP requests, and analyzing the application's responses. You can send a request to Repeater from anywhere within Burp, modify the request and issue it over and over.
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This release gives the Scanner the capability to report all instances where user input is returned in application responses, both reflected and stored. The information gathered is primarily of use to manual security testers. Some applications contain numerous instances of input retrieval, since it is very common for the entire URL to be reflected within responses. For these reasons, the new Scanner checks are off by default, but can be turned on in the Scanner options.