Possibility to upload file with filtered extension

[ArtemLikhenko]

I've found out that for filter { title: 'Image files', extensions: 'jpg,gif,png,jpeg' } user can upload file with "wrong" extension, for example next one "example.jpg2000" , but it should be ignored because extension ".jpg2000" is not included in filter. So, I've made some investigation and found following code:

if (filters && filters.length) {
    extensionsRegExp = [];

        plupload.each(filters, function(filter) {
        plupload.each(filter.extensions.split(/,/), function(ext) {
        if (/^\s*\*\s*$/.test(ext)) {
            extensionsRegExp.push('\\.*');
        } else {
            extensionsRegExp.push('\\.' + ext.replace(new RegExp('[' + ('/^$.*+?|()[]{}\\'.replace(/./g, '\\$&')) + ']', 'g'), '\\$&'));
        }
    });
   });

extensionsRegExp = new RegExp(extensionsRegExp.join('|') + '$', 'i');
}

The code produces following regular expression: /.jpg|.gif|.png|.jpeg$/i , but in my opinion it should be /.jpg$|.gif$|.png$|.jpeg$/i.

So to fix this bug I suggest to replace this string:

extensionsRegExp = new RegExp(extensionsRegExp.join('|') + '$', 'i');

by

extensionsRegExp = new RegExp(extensionsRegExp.join('$|') + '$', 'i');

Thanks,
Artem