Is is able to make phpMussel scan when a user uploads a file?
Topic on Project:Support desk
https://www.mediawiki.org/wiki/Manual:Configuring_file_uploads#Configuring_file_types says "think about enabling virus scans for uploads" but not how. :) If you find out feel free to improve the documentation, please!
Don't know whether it will work with PHP based phpMussel or not, though.