From $WL_HOME/server/lib run this :
[oracle@dev01-wls-1 lib]$ pwd
/u01/app/oracle/products/fmw_12214/wlserver/server/lib
[oracle@dev01-wls-1 lib]$ java -cp weblogic.jar weblogic.version -version -verbose
WebLogic Server 12.2.1.4.0 Thu Sep 12 04:04:29 GMT 2019 1974621 ImplVersion: 12.2.1.4.0
Oracle Security Developer Tools Security Engine ImplVersion: 3.1.0
Oracle Security Developer Tools Crypto ImplVersion: 3.1.0
Oracle Universal Connection Pool ImplVersion: 19.3.0.0.0
etc...
There are other ways to check the version but this seems to the easiest and most comprehensive.
Download :
