Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Asset Pipeline Grails Plugin Asset-pipeline plugin version Prior to 188.8.131.52, 2.15.1 and 3.0.6 contains a Incorrect Access Control vulnerability in Applications deployed in Jetty that can result in Download .class files and any arbitrary file. This attack appear to be exploitable via Specially crafted GET request containing directory traversal from assets-pipeline context. This vulnerability appears to have been fixed in 184.108.40.206 (for Grails 2.x), 2.15.1 (for Grails 3 and Java 7) and 3.0.6 (for Grails 3 and Java 8).
All versions before 2.14.1, version 2.15.0, all versions starting from 3.0.0 before 3.0.6
Upgrade to versions 2.14.1, 2.15.1, 3.0.6 or above.