Flaw bug created to hold information about an old flaw we knew something about. For more details see the MITRE CVE description.
MITRE description: Bugzilla 2.14 before 2.14.2, and 2.16 before 2.16rc2, when performing a mass change, sets the groupset of all bugs to the groupset of the first bug, which could inadvertently cause insecure groupset permissions to be assigned to some bugs.