Question2Answer default wysiwyg editor has been replaced with CKEditor4. CKEditor (4.4.7) of Question2Answer wysiwyg-editor is old. And it has XSS vulnerability. Therefore we replaced it with CKEditor4. And CKEditor was updated to V4.5.3.
In addition, plugin have been improved greatly. As the same time, htmLawed updated to 1.2 Beta 8. In this change, content editing has been greatly improved.
More information is here.