Mailman 2.1.11.cp3 Bug

We received an odd email from one of our clients saying that they hit a bug in Mailman:

Bug in Mailman version 2.1.11.cp3

We’re sorry, we hit a bug!

Please inform the webmaster for this site of this problem. Printing of traceback and other system information has been explicitly inhibited, but the webmaster can find this information in the Mailman error logs.

Upon checking, it seems that a recent cPanel upgrade changed the permissions of the Mailman folder, resulting to the error. A quick fix can be done using the command line (or via SSH to your Linux server):

chmod 02775 -R /usr/local/cpanel/3rdparty/mailman/

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