Rascals are always sociable, and the chief sign that a man has any nobility in his character is the little pleasure he takes in others company. Arthur Schopenhauer

SpringShell: Spring Core RCE 0-day Vulnerability

Updated, it’s confirmed now.

As the world’s most popular Java lightweight open-source framework, Spring allows developers to focus on business logic and simplifies the development cycle of Java enterprise applications.

However, in the JDK9 version (and above) of the Spring framework, a remote attacker can obtain the AccessLogValve object and malicious field values through the parameter binding function of the framework on the basis of meeting certain conditions, thereby triggering the pipeline mechanism and writing arbitrary fields. SpringShell: Spring Core RCE 0-day Vulnerability - Image

An unconfirmed, but probable, remote code execution vulnerability is believed to exist in Spring, an extremely popular Java framework. This issue is likely easily exploited in common configurations. If confirmed, another notice will be sent out with a severity of ‘critical’. While unconfirmed, the severity has been assigned ‘high’.

Looks serious if confirmed.