문제 https://xss-game.appspot.com/level5 https://xss-game.appspot.com/level5 Oops! Based on your browser cookies it seems like you haven't passed the previous level of the game. Please go back to the previous level and complete the challenge. xss-game.appspot.com 문제풀이 welcome.html 에서 Sign up 문자열을 누르면 next 파라미터에 confirm 값을 전달하며 signup.html 로 이동한다. signup.html 에서 email 입력값과 무관하게 Next 문자열을 누르면 next 파..