A flaw was found in Wildfly 9.x. A path traversal vulnerability through the org.wildfly.extension.undertow.deployment.ServletResourceManager.getResource method could lead to information disclosure of arbitrary local files.
https://issues.jboss.org/browse/WFLY-9620
https://bugzilla.redhat.com/show_bug.cgi?id=1528361
https://access.redhat.com/errata/RHSA-2018:2938
https://access.redhat.com/errata/RHSA-2018:1251
https://access.redhat.com/errata/RHSA-2018:1249