views/switch.py in django-grappelli (aka Django Grappelli) before 2.15.2 attempts to prevent external redirection with startswith("/") but this does not consider a protocol-relative URL (e.g., //example.com) attack.
{ "versions": [ { "introduced": "0" }, { "fixed": "2.15.2" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-46898.json"