MantisBT unauthorized disclosure of private project column configuration

Impact

Due to insufficient access-level checks, any non-admin user having access to manage_config_columns_page.php (typically project managers having MANAGER role) can use the Copy From action to retrieve the columns configuration from a private project they have no access to.

Access to the reverse operation (Copy To) is correctly controlled, i.e. it is not possible to alter the private project's configuration.

Patches

The vulnerability will be fixed in MantisBT version 2.27.2.

Workarounds

None

Credits

Thanks to d3vpoo1 for reporting the issue.