Permissions, Privileges, and Access Controls
The access_has_bug_level function in core/access_api.php in MantisBT before 1.2.9 does not properly restrict access when the private_bug_view_threshold is set to an array, which allows remote attackers to bypass intended restrictions and perform certain operations on private bug reports.
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.