Post Duplicator WordPress plugin vulnerabilities

The Post Duplicator WordPress plugin before version 3.0.18 does not validate the capabilities assigned to roles through its permissions settings, allowing a site administrator on a multisite network who is not a Super Admin to grant any role arbitrary capabilities, including the network-management capabilities reserved to the Super Admin.

The Post Duplicator WordPress plugin before version 3.0.18 does not restrict settings saves to its own options, allowing a site administrator on a multisite network who is not a Super Admin to overwrite arbitrary options of their site, including the role definitions, and so grant themselves network-management capabilities.

The Post Duplicator WordPress plugin before 3.0.17 does not check whether the requesting user may view each post before returning a list of posts for a post type. This allows users with a role as low as Contributor to read the titles and hierarchy of other users' draft and private posts.

The Post Duplicator WordPress plugin before version 3.0.15 does not safely handle custom meta-data during post duplication, allowing attacker-supplied serialized values to be stored without the WordPress meta API's double-serialization protection.