The django.http.HttpRequest.get_host function in Django 1.3.x before 1.3.4 and 1.4.x before 1.4.2 allows remote attackers to generate and display arbitrary URLs via crafted username and password Host header values.
"https://github.com/pypa/advisory-database/blob/main/vulns/django/PYSEC-2012-7.yaml"