If your running a nulled version of 3.6.X or below you can be exploited if you ha left your /install/ folder present to avoid being exploited please removed this folder since they can downgrade your servers as theres no keys etc to stop them from accesing the upgrade scripts.
This does not count with licences versions. and versions 3.7.X & 3.8.X
If you think you cant downgrade you just use the forced method ?step=1,2 etc.
This does not count with licences versions. and versions 3.7.X & 3.8.X
If you think you cant downgrade you just use the forced method ?step=1,2 etc.