Mail Attachments don’t work since 5.4.1

Where can we see the website in question?

Hi Takayuki,

I’m facing the same issue on this form:
https://cdma.happy-dev.fr/candidater/?email=zeineb.abdelli%40greta-cdma.paris&formation=BMA%20%C3%A9b%C3%A9niste

I had to revert back to version 5.3 of the plugin for it to work again.
The form isn’t sent when I use 5.4.*
I receive a non explicit 500 issue when I try to submit the form with a [file] field in my form with them.

Hi @takayukister, the original website is a non-public site, but i built a testing environment: https://www.dezemberundjuli.ch/testings/testpage-for-testing-mailattachments-cf7/

Mailattachments work with cf7 5.4, wont work with 5.4.1 and 5.4.2 (installed). No matter wether WordPress Version (5.7/5.8).

Thanks a lot!
Patrick

See Setting up mail

What email settings do you have in the Mail tab panel?

To protect personal data, hiding email addresses in the settings or replacing them with dummy addresses is strongly advised. You can also include screenshots.

@takayukister you can download the Screenshots here:

https://dezemberundjuli.ch/Downloads/Screenshots-CF7.zip

Testing environment:
https://www.dezemberundjuli.ch/testings/testpage-for-testing-mailattachments-cf7/

Please notice: No problems with file attachments in emails with version 5.4, with 5.4.1. and 5.4.2 the attachments will not be sent via email.

Thanks!

What other plugins and theme do you use on the site?

@takayukister on both sites with the same problem we use the theme ?Create? from Themetrust (one of our favorites on many sites) with SiteOrigin Pagebuilder.

Plugin list from both sites downloadable:
https://dezemberundjuli.ch/Downloads/Pluginlist.zip

Thanks!

Try switching to the default theme, deactivating all plugins excluding Contact Form 7, and clearing all cache data.

Why you are advised to deactivate plugins and switch to the default theme.

Okay, I will build up a clean install for a testing environment next week.

If I understand you correctly, you have in your installations no problems with mailattachments since version 5.4.1? Right? This information would limit the troubleshooting.

Small progress on my side : I’ve identified that the problem was coming from the Wordfence plugin. When a file is attached in the form, Wordfence’s firewall blocks it for a reason I could not understand.

I tried to set an exception in Wordfence but couldn’t. I had to turn off the firewall completely.

I can’t tell if the problem is on CF7 or Wordfence, but I’m willing to help debugging as much as necessary if you feel link fixing this one @takayukister

If you consider Wordfence compatibility is out of the scope of your duty, I won’t try to take this one on on my own

Dear Takayuki Miyoshi (@takayukister)

We could meanwhile get CF7 attachments running again. It seems, the latest update has troubles, when the temporary upload folder is placed outside of the WordPress folder.

We had to comment out the following condition in:

wordpress/wp-content/plugins/contact-form-7/includes/mail.php

Line 156 thru 169

if ( ! wpcf7_is_file_path_in_content_dir( $path ) ) {
if ( WP_DEBUG ) {
trigger_error( sprintf(/* translators: %s: Attachment file path. */
__( ‘Failed to attach a file. %s is not in the allowed directory.’,
‘contact-form-7’ ), $path), E_USER_NOTICE );
}
return false;
}

May be you can fix this for the next update.

@takayukister what do you think about the comment above? Will you fix this for the next update? Thanks for your support and great work!