description: In Apache Struts 2.5 through 2.5.5, if an application allows entering a URL in a form field and the built-in URLValidator is used, it is possible to prepare a special URL which will be used to overload server process when performing validation of the URL.
problem types: Possible DoS attack when using URLValidator
affected:
{
product: Apache Struts
vendor: Apache Software Foundation
versions:
status: affected, version: 2.5 - 2.5.5
}