The jar-versions.xml file in jboss_home (if you downloaded and unzipped the zip file, not sure if it is there if your used the installer) appears to list all of the jar files and provides and implVersion property that looks to be the actual version for the file. In 4.0.4GA, for Hibernate it states: <jar name="hibernate3.jar" specVersion="4.0.4.GA" specVendor="JBoss (http://www.jboss.org/)" specTitle="JBoss" implVersion="3.2.0.cr2" implVendor="hibernate.org" implTitle="Hibernate3" implVendorID="http://www.jboss.org/" implURL="http://www.jboss.org/" sealed="false" md5Digest="b09b1d2e2aa731aef18af546e63dd646"/> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3974250#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...