Unspecified vulnerability in the XOOPS uploader class in Xoops 2.0.17.1-RC1 and earlier allows remote attackers to upload arbitrary files via unspecified vectors related to improper upload configuration settings in class/uploader.php and class/mimetypes.inc.php, possibly an incomplete blacklist that omits the .php4 extension.
http://www.xoops.org/modules/news/article.php?storyid=3963
http://www.vupen.com/english/advisories/2007/3315
http://www.securityfocus.com/bid/25878
http://sourceforge.net/project/shownotes.php?group_id=41586&release_id=543338