If you are using Oracle WebLogic Server, it is better to check your system if any vulnerability exists.
It is a vulnerability that allows attackers to capture your WebLogic Server with a remote code execution. The vulnerability scored as 9.8 over 10 which makes it critical. Latest patch for this vulnerability bypassed by the attackers.
Published patch for this vulnerability is bypassed. So we recomend you to close external access to WebLogic servers until a new patch is released.