This plugin will help you convert your forum posts, threads, categories, users and tags from the vBulletin forum to bbPress plugin in minutes.
Note. This plugin installs connection bridge on WordPress website with bbPress, which is required for data interaction between bbPress and vBulletin.
Website design (styles, themes) isn’t migrated.
For more information follow this link: http://www.cms2cms.com/supported-cms/vbulletin-to-wordpress-migration/?utm_source=vBulletin&utm_medium=Link&utm_campaign=WordPress_plugins