Security - Xoops Multiple Cross-Site Scripting Vulnerabilities

Description
Multiple vulnerabilities have been discovered in Xoops, which can be exploited by malicious people to conduct cross-site scripting attacks.

1) Input passed to the "module" parameter (when "fct" is set to "modulesadmin" and "op" is set to "install") in modules/system/admin.php is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
2) Input passed to the "module[]", "newname[]", and "oldname[]" POST parameters (when "fct" is set to "modulesadmin" and "op" is set to "confirm") in modules/system/admin.php is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
3) Input passed to the "memberslist_id[]" POST parameter (when "fct" is set to "mailusers") in modules/system/admin.php is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
The vulnerabilities are confirmed in version 2.5.0. Other versions may also be affected.

Solution
Edit the source code to ensure that input is properly sanitised.
Further details available in Customer Area

Provided and/or discovered by
Aung Khant, YGN Ethical Hacker Group

Original Advisory
http://yehg.net/lab/pr0js/advisories/[xoops_2.5.0]_cross_site_scripting
http://xoops.org/modules/news/article.php?storyid=5851

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