In Django 2.2 before 2.2.21, 3.1 before 3.1.9, and 3.2 before 3.2.1, MultiPartParser, UploadedFile, and FieldFile allowed directory traversal via uploaded files with suitably crafted file names.
"https://github.com/pypa/advisory-database/blob/main/vulns/django/PYSEC-2021-7.yaml"