Permissions, Privileges, and Access Controls
suPHP before 0.6.3 allows local users to gain privileges via (1) a race condition that involves multiple symlink changes to point a file owned by a different user, or (2) a symlink to the directory of a different user, which is used to determine privileges.
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.