Unable to download firmware to Cisco WLC via http

The following error is displayed in the message log:

show msglog

*emWeb: Jan 12 13:18:28.934: %EMWEB-3-FORM_SUBMIT_CSRF_DETECTED: ews_form.c:1229 Form submit action failed. Cross Site Attack detected form_idx=295 url=/screens/base/file_download_frame.html formCsrfTbl[295]=1.

Workaround:

Disable Web CSRF check

config network secureweb csrfcheck disable

Download the file again.  Then, re-enable Web CSRF check.