In this study the proponents tried to investigate how Cross-Site Scripting attacks (XSS) can be minimized through a web proxy server application. Stealing cookies, phishing and other computer crime to a certain websites have been rampant these days. One of which is through cross-site scripting. The proponents used an experimental design in conducting this research. A list of XSS vulnerable websites was generated together with a list XSS script. A web proxy server was created containing scripts that identifies XSS attacks and minimizes their penetration to the website. The proponents recommend other existing XSS scripts for testing against the web proxy server be included to the XSS database. It would be better to include artificially intelligent algorithm to automatically detect a certain attacks so that the XSS database will not need to be populated, and thus not consume too much space on the server.