定位具体产品，查看其公开漏洞暴露情况。
This plugin retrieves the X-UA-Compatible value from the HTTP header and meta http-equiv tag. - More Info: http://msdn.microsoft.com/en-us/library/cc817574.aspx
X-Vortech-PHP HTTP header.
This plugin retrieves the X-XSS-Protection value from the HTTP header. - More Info: http://msdn.microsoft.com/en-us/library/cc288472%28VS.85%29.aspx
X.ai
X10media MP3 search engine
X10 Torrent Script is a bittorrent search engine, users fill in a keyword and get access to 5 000 000 files for search.
X6CMS网站内容管理系统
X7 Chat is a free script that can be modified and redistributed in any way that you want as long as the X7 Chat copyright logo remains in place.
Xajax 是一个开源的 PHP 类库，用于便捷地开发基于 PHP 的 Ajax Web 应用。通过 Xajax，开发者可以异步调用 PHP 函数并更新网页内容，而无需重新加载整个页面，通常配合 PHP、HTML、CSS 和 JavaScript 使用。项目采用 BSD 许可证发布，由 Jared White、J. Max Wilson、Joseph Woolley、Steffen Konerow 等人维护，其后续分支为 Jaxon。
Xanario
Xaraya
XATABoost
Xataface is a full-featured Web application framework. It automatically generates the appropriate forms, lists, and menus for a user to interact with a MySQL database without having to know any SQL.
Xavante is a Lua HTTP 1.1 Web server that uses a modular architecture based on URI mapped handlers.
XBMC (formerly 'Xbox Media Center') is a free, open source (GPL) multimedia player that runs on the first-generation Microsoft Xbox, (not the newer Xbox 360), as well as on computers running Linux, Mac OS X, and Windows.
XBROTHER-Monitor
Old forum
xCharts
xcyg-System
XDcms(旭东单语言企业网站管理系统)
Xdoa-OA
XecureVPN
Xeneo Web Server
Commercial community forum developed in PHP.