This affects the package drogonframework/drogon before 1.7.5. The unsafe handling of file names during upload using HttpFile::save() method may enable attackers to write files to arbitrary locations outside the designated target folder.
https://snyk.io/vuln/SNYK-UNMANAGED-DROGONFRAMEWORKDROGON-2407243
https://github.com/drogonframework/drogon/pull/1174
https://github.com/drogonframework/drogon/commit/3c785326c63a34aa1799a639ae185bc9453cb447