The Hacker News: Alexander Fuchs, A German Security Researcher Discover Persistent XSS Vulnerability in Official website of White House.

The petition system is vulnerable. Every Petition i start or join will execute my code. I could join all petitions and my code will be executed on all users who visit the petition system.” He said.
Read full story in German:

The XSS Demo is here:!/petition/security/WxgwM7DS
What is XSS?