This affects all versions of package github.com/kataras/iris; all versions of package github.com/kataras/iris/v12. The unsafe handling of file names during upload using UploadFormFiles method may enable attackers to write to arbitrary locations outside the designated target folder.
https://github.com/kataras/iris/commit/e213dba0d32ff66653e0ef124bc5088817264b08