SOLVED Precondition Failed

[User8472]

Hi,
I've got a perl script I've been using for years for file uploads and it has been working great. Had a customer use it last week. Now I'm getting the following error (script hasn't been changed):

Precondition Failed
The precondition on the request for the URL /upload/file-upload.cgi evaluated to false.

Additionally, a 412 Precondition Failed error was encountered while trying to use an ErrorDocument to handle the request.
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After doing some investigating, it seems that Apache doesn't want to accept a form input type of "file". Any test form that has a "file" input type is getting the above error. It's accepting regular "text" input types in forms with no issue.

Any ideas what's happening/where I can look to fix this?

Thanks in advance!

 

[User8472]

Just a quick update. When this error occurs the script isn't executed. I can run the script directly with no errors (in this case it doesn't really do anything since it's not getting inputs from a form). Only when the script is called via the submission of a form with a "file" input type the error happens.

 

[cPanelMichael]

Hello @User8472,

Can you check if your Mod_Security rules are blocking requests to that script? You can review recent ModSecurity hits via WHM >> ModSecurity Tools.

Thank you.

 

[User8472]

Looks like that was it!
Not sure how it got in there. I'll ask around, there's a couple people with whm access but they shouldn't be playing around with such things!

Thank you.