youth-is-as-pale-as-poetry e-learning JWT Token JwtUtils.java encryptSecret random values

A vulnerability has been found in youth-is-as-pale-as-poetry e-learning 1.0. Impacted is the function encryptSecret of the file e-learning-master\exam-api\src\main\java\com\yf\exam\ability\shiro\jwt\JwtUtils.java of the component JWT Token Handler. The manipulation leads to insufficiently random values. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitability is considered difficult. The exploit has been disclosed to the public and may be used.