I am running 2.9.3 using Channel Forms, the issue is if I try and upload a excel or .xlsx file it never uploads, even though eventually the form submits (it's considerable slower submit), no upload happens.

If I try .txt or an image file, it's fine. I have the enctype="multipart/form-data" in the tag, so not sure what might be occurring here. Any ideas, I have been at it for a while and not sure what it might be.

  • Try uploading the same file into the same folder via the file manager to confirm the file type is allowed & folder is writable. Commented May 31, 2015 at 10:30
  • I tried that and it's totally fine through the ACP, it's only via channel form it goes wonky.
    – Vin
    Commented Jun 1, 2015 at 7:01
  • Post up the relevant code then. Commented Jun 1, 2015 at 7:02

1 Answer 1


I had the same issue. You can solve it by disabling XSS filtering:

Admin -> Security and Privacy -> Security and Sessions. Than select "No" for "Apply XSS Filtering to uploaded files"

  • Excellent, that worked :) Thank you, very grateful!
    – Vin
    Commented Jun 1, 2015 at 18:17

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