It was found that file upload functionality in business central allows javascript code to be included in the file that is executed via error message as it's being showed in HTML mode. Upstream bug: https://issues.jboss.org/browse/RHBPMS-4627
Acknowledgments: Name: Chris Hebert, Vikas Pandey, Harold Schliesske, Ryan Stanley (Noblis)
This issue has been addressed in the following products: Red Hat JBoss BPM Suite 6.4.3 Via RHSA-2017:1218 https://access.redhat.com/errata/RHSA-2017:1218
This issue has been addressed in the following products: Red Hat JBoss BRMS 6.4.3 Via RHSA-2017:1217 https://access.redhat.com/errata/RHSA-2017:1217