Permissions, Privileges, and Access Controls
Apple iTunes before 11.2.1 on OS X sets world-writable permissions for /Users and /Users/Shared during reboots, which allows local users to modify files, and consequently obtain access to arbitrary user accounts, via standard filesystem operations.
CWE-264 - Permissions Privileges and Access Controls
CWE 264 (permissions, privileges, and access controls) is not a weakness in and of itself, rather it is a category of weaknesses related to the management of permissions, privileges, and other security features used to perform access control. If not addressed, the weaknesses in this category allow attackers to gain privileges for an unintended sphere of control, access sensitive information, and execute arbitrary commands.