id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
21548	Add the ability to limit file extensions for ImageField and FileField	Tim Graham	Berker Peksag	"ImageField/FileField could have an optional extension whitelist.  This could default to being empty for both fields to be totally backwards compatible, or could have sensible defaults for the ImageField based on the file types supported by PIL/low. The documentation should warn that you should not rely on file extensions to determine the actual content type of files.

There are probably some existing implementations we could borrow from, for example:

https://djangosnippets.org/snippets/977/"	New feature	closed	Forms	dev	Normal	fixed		anubhav9042@… berker.peksag@…	Ready for checkin	1	0	0	0	0	0