CVE-2007-5188 (http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5188): 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.
Solution: Apply the patch. (http://downloads.sourceforge.net/xoops/xoops-uploader-patch-071001.tar.gz)
xoops is p.masked, no need to bother with that.