Thread:Project:Support desk/Is there a way to upload MS Excel .xls files and PDF files in Mediawiki?/reply (7)

If I am informed correctly, .doc files can contain macros, while .docx files cannot (you would have to save - not only rename - them as .docm instead). I don't know what malicious stuff else can be inside docx files.

I understand that as that it means that you cannot say that upload of MS Office files would be secure.