Since nobody noticed Hervert question (which is the answere too
) I'll answere:
The news uploader is using class/uploader.php so mime types for the files uploaded needs to be defined (the defaults are jpg, png, gif, pdf zir, tar jtar (open file news/submit.php and look for (round line 326)
$permittedtypes=array('image/gif', 'image/jpeg', 'image/pjpeg', 'image/x-png', 'image/png' ,'application/x-zip-compressed', 'application/pdf', 'application/x-gtar', 'application/x-tar');
If you want your users to be able to attach some more file types, add those as changed here (WORD and EXCELL addition):
$permittedtypes=array('image/gif', 'image/jpeg', 'image/pjpeg', 'image/x-png', 'image/png' ,'application/x-zip-compressed', 'application/pdf', 'application/x-gtar', 'application/msexcel', 'application/msword', 'application/x-tar');
Some popular mime types to choose from:
application/pdf => PDF Document
image/x-png => PNG Image
video/vivo => VIVO Movie
application/x-compress => Compressed Zip File
video/x-msvideo => MS Video
text/html => HTML Page
audio/x-pn-realaudio => Real Audio File
image/gif => GIF Image
video/mpeg => MPEG Video'
image/ico => Icon Files
application/x-tar => TAR Ball
image/x-MS-bmp => BMP Image
image/tiff => TIFF Image
text/richtext => Rich Text
audio/x-realaudio => Real Audio
application/mac-binhex40 => Mac Binary
audio/x-aiff => AIFF File
application/x-gzip => GZIP File
application/zip => ZIP File
application/postscript => Postscript
application/msword => MS Word doc
application/msexcel => Excel File
application/vnd.msexcel => Excel File
video/quicktime => QuickTime Movie
application/powerpoint => PowerPoint Doc
audio/x-wav => WAV File
audio/x-mpeg => MPEG Audio
image/jpeg => JPEG Image
application/x-zip-compressed => ZIP File
application/octet-stream => OCTET Stream
text/plain => Text File
image/pjpeg => JPEG Image
Was tested under both winXp Linux and FreeBSD, XOOPS 2.092 with uploader.php 1.6
Hope this will answere your question
Just be awareof the risk in letting your users upload a "Virus anabled kinda files