An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. Any authenticated user can create an EC2 credential for themselves for a project that they have a specified role on, and then perform an update to the credential user and project, allowing them to masquerade as another user. This potentially allows a malicious user to act as the admin on a project another user has the admin role on, which can effectively grant that user global admin privileges.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| keystone(PyPI) | 0 | 15.0.1 | N/A |
| keystone(PyPI) | 16.0.0 | 16.0.1 | N/A |
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