Django before 1.4.18, 1.6.x before 1.6.10, and 1.7.x before 1.7.3 allows remote attackers to spoof WSGI headers by using an _ (underscore) character instead of a – (dash) character in an HTTP header, as demonstrated by an X-Auth_User header. (CVSS:5.0) (Last Update:2015-01-20)