A SSRF vulnerability using the Aegis DataBinding in versions of Apache CXF before 4.0.4, 3.6.3 and 3.5.8 allows an attacker to perform SSRF style attacks on webservices that take at least one parameter of any type. Users of other data bindings (including the default databinding) are not impacted.
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.