GroupWise 5.5 and 6 running in live remote or smart caching mode allows remote attackers to read arbitrary users' mailboxes by extracting usernames and passwords from sniffed network traffic, as addressed by the "Padlock" fix.
GroupWise WebAccess 5.5 with directory indexing enabled allows a remote attacker to view arbitrary directory contents via an HTTP request with a lowercase "get".
The Java Server in the Novell GroupWise Web Access Enhancement Pack allows remote attackers to cause a denial of service via a long URL to the servlet.
Groupwise web server GWWEB.EXE allows remote attackers to read arbitrary files with .htm extensions via a .. (dot dot) attack using the HELP parameter.