XSS attacks are quite a common security threat in web applications. For example, suppose your web application contains a url like below.
An attacker can get his own script executed from above url, if you have not checked and fixed your xss vulnerabilities. He could perform a malicious script like below.
If above url did not contain proper encoding , when accessing above url, the script will be executed against your application.
In a jaggery based application , in order to encode you could easily use owasp java encoder.
In your jag file, first import the encoder like below.
var Encode = Packages.org.owasp.encoder.Encode;
Next you could use the Encode methods where and when it is related. For example let us take the above url , and let us assume that this url is implemented to be at a button click like below.
After encoding, this would escape the ending script tag like, </ \ script> . Depending on the content you need to encode , you would have to choose the relevant encoding method, such as forHtml, forUriComponent etc.. You could find all the related methods in .