Read the original article: How to Apply Patches to Mule 4.x
Patching a known security hole is like putting a better lock on a door that the bad guys can’t sneak through. It’s like removing the door altogether, so there’s no longer any way through at all.
Mulesoft releases patches from time to time to protect the application from compromise. Applying a patch is necessary for all deployment models. Although Mulesoft takes care of CloudHub customers, customers which are using Standalone, RTF, PCF, and PCE have to be taken care of by themselves.
Read the original article: How to Apply Patches to Mule 4.x