Permissions, Privileges, and Access Controls
index.php in Ryan Haudenschilt Family Connections (FCMS) before 0.9 allows remote attackers to access an arbitrary account by placing the account's name in the value of an fcms_login_id cookie. NOTE: this can be leveraged for code execution via a POST with PHP code in the content parameter.
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.