SFX-SQLi (Select For XML SQL injection) is a new SQL injection technique which allows to extract the whole information of a Microsoft SQL Server 2005/2008 database in an extremely fast and efficient way.

This technique is based on the FOR XML clause, which is able to convert the content of a table into a single string, so its contents could be appended to some field injecting a subquery into a vulnerable input of a web application.

Paper : click
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