In Django 2.2 before 2.2.20, 3.0 before 3.0.14, and 3.1 before 3.1.8, MultiPartParser allowed directory traversal via uploaded files with suitably crafted file names. Built-in upload handlers were not affected by this vulnerability.
docs.djangoproject.com/en/3.1/releases/security/
groups.google.com/g/django-announce/c/ePr5j-ngdPU
lists.debian.org/debian-lts-announce/2021/04/msg00008.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZVKYPHR3TKR2ESWXBPOJEKRO2OSJRZUE/
security.netapp.com/advisory/ntap-20210528-0001/
www.djangoproject.com/weblog/2021/apr/06/security-releases/