This post will explain how to upgrade Git Plugin in your Jenkins due to impact of store XSS attacks and how to resolve  stored XSS vulnerabilities.



Open the Jenkins console window and use the URL: http://192.168.0.20:8080/pluginManager/ and enable check box on the Git plugin and click on "Download now and install after restart" button.

Restart the Jenkins Server and see the Jenkins manage page, http://192.168.0.20/manage. The above Critical alert is vanished.