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.
Use the links below for help about Burp Repeater:
Get help from other users, at the Burp Suite User Forum:
This release fixes a bug which was introduced in the v1.5rc2 release, and which caused the active scan checks for XSS to fail to execute in some situations