What should I do to prevent XSS in Java? I"m using Spring MVC. Right now I am just putting all places where I output user text into
<c:out /> tags, but this seems error prone as I might miss a place.
Is there an easy systematic way to prevent this? Maybe like a filter or something?
EDIT: I"m collecting input by specifying
@RequestParam parameters on my controller methods.
In Spring you can escape the html from JSP pages generated by
<form> tags. This closes off a lot avenues for XSS attacks, and can be done automatically in three ways:
For the entire application in the
For all forms on a given page in the file itself:
<spring:htmlEscape defaultHtmlEscape="true" />
For each form:
<form:input path="someFormField" htmlEscape="true" />