"You've hit a bug" errors for mailman lists in my server (cpanel)

[violin]

Hello,

It seems my mailman lists are broken without making any changes to the server. When I logged in the mailman list as administrator, I see the error message ""You've hit a bug" and I can't list anything there. Any help would be appreciated!

[OC-Scott]

It appears the recent cPanel update broke mailman on servers, so if you see "You've found a bug" error it's probably due to missing suid bit on the cgi-bin executable. In order to quickly fix the issue run:

chmod g+s /usr/local/cpanel/3rdparty/mailman/cgi-bin/*

If that don't help, feel free to submit a ticket to the helpdesk ; we will get back to you with the possible solutions.