License question

We develop an Open Source CMS licensed under BSD/MIT license which theoretically allows for creating commercial modifications out of it. Is it permitted to ship HTML Purifier with such a CMS or with its derivatives?

An LGPL project is permitted to be used inside a BSD project, but the two licenses are not compatible and you will need to notify your users that the HTML Purifier section is LGPL. LGPL has no provision against commercial use.

Thanks a lot for clarifying this point and for the HTML Purifier itself! I will inform you when we make a release using it.