There are various reason to have messages like
The error was:
<pre>
Mailman CGI error!!!
This entry is being stored in your syslog:

Failure to exec script. WANTED gid 502, GOT gid 48.  (Reconfigure to take 48?)
</pre>

<p>Below are possible solutions</h2>
<ul>
  <li><a href="#Wanted502">WANTED gid 502, got 48</a> (October, 2012)</li>
  <li><a href="#Wanted48">WANTED gid 48, got 412</a> (May, 2014)</li>
</ul>
<hr/>

<h2><a name="Wanted502">WANTED gid 502, got 48</a></h2>

In October, 2012, the error was:
<pre>
Mailman CGI error!!!
This entry is being stored in your syslog:

Failure to exec script. WANTED gid 502, GOT gid 48.  (Reconfigure to take 48?)
</pre>

<p>In <a href="http://embedded.eecs.berkeley.edu/dopsysadmin/faq/111.html">Installing Mailman</a> said:
<pre>
./configure --with-cgi-gid=48
</pre>
gid 502 is <code>www</code>.
<br/> gif 48 is <code>apache</code>

<p>However, rebuilding with <code>--with-cgi-gid=48</code> 
does not solve the problem.</p>

<h3><a name="suexec">Using suexec</a></h3>

<p><a href="https://www.redhat.com/support/resources/faqs/RH-apache-FAQ/misc/suexec.html">https://www.redhat.com/support/resources/faqs/RH-apache-FAQ/misc/suexec.html</a></p>
<blockquote>
 Verify that /usr/sbin/suexec has permissions set to 4711. When these are properly set you will see something like this in your error log at startup:

[Sun Oct 3 03:56:39 1999] [notice] Red Hat Secure/3.0 (Unix) DAV/0.9.8 mod_perl/1.19 PHP/3.0.9 configured -- resuming normal operations
[Sun Oct 3 03:56:39 1999] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
</blockquote>

Indeed, after I did 
<pre>
chmod 4711 /usr/sbin/suexec
/etc/init.d/httpd restart
</pre>
then /usr/local/apache/logs/error_log had:
<pre>
[Tue Oct 16 14:10:40 2012] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
</pre>

<p>See <a href="https://httpd.apache.org/docs/2.2/suexec.html">https://httpd.apache.org/docs/2.2/suexec.html</a></p>

<p>In the end, the issue was that:</p>
<ul>
<li><code>/home/mailman_6/cgi-bin/admin</code> need to be
copied to <code>/var/www/mailman_6/cgi-bin</code>.
This is because <code>suexec -V</code> has the docroot
as <code>/var/www</code>.
<pre>
[root@moog cgi-bin]# suexec -V
 -D AP_DOC_ROOT="/var/www"
 -D AP_GID_MIN=100
 -D AP_HTTPD_USER="apache"
 -D AP_LOG_EXEC="/var/log/httpd/suexec.log"
 -D AP_SAFE_PATH="/usr/local/bin:/usr/bin:/bin"
 -D AP_UID_MIN=500
 -D AP_USERDIR_SUFFIX="public_html"
</pre>
</li>
<li>The following permissions need to be set:
<pre>
[root@moog cgi-bin]# ls -ld /var/www/mailman_6/cgi-bin
drwxr-xr-x 2 www www 4096 Oct 16 14:31 /var/www/mailman_6/cgi-bin
[root@moog cgi-bin]# ls -ld /var/www/mailman_6/cgi-bin/admin
-rwxr-xr-x 1 www www 19082 Oct 16 14:55 /var/www/mailman_6/cgi-bin/admin
</pre>
</li>

<li> <code>httpd-vhosts.conf</code> needs to have
the following for each VirtualHost
<pre>
    SuexecUserGroup www www
</pre>
</li>
<li>suexec does not work if the gid is less than 100 or
the hostid is less than 500.  So, <code>/etc/passwd</code>
and <code>/etc/group</code> need to be updated so
that the www gid is greater than 100 and the uid is greater than 500. 
</li>
</ul>

<h3><a name="suexec">Not using suexec</a></h3>

<i>suexec above seems really wrong, can we just use the apache gid/uid and not use Suexec?</i>
<ul>

<li>Edit <code>httpd-vhosts.conf</code> and comment out
<code>SuexecUserGroup</code> and change
<pre>
   #ScriptAlias /mailman/ "/var/www/mailman_6/cgi-bin/"                               
    ScriptAlias /mailman/ "/home/mailman_6/cgi-bin/
</pre>
</li>

<li> Disable suexec:
<pre>
chmod o-x /usr/sbin/suexec
/etc/init.d/httpd restart
</pre>
Check <code>error_log</code> that suexec is not enabled.
</li>

<li>Rebuild Mailmaim
<pre>
cd /root/tools/mailman-2.0.13
make clean
./configure --prefix=/home/mailman_6 --with-cgi-gid=apache --with-python=/usr/local/bin/python25
make install
</pre>

<li> The cgi admin script looks like:
<pre>
[root@moog mailman-2.0.13]# ls -l /home/mailman_6/cgi-bin/admin
-rwxr-sr-x 1 root www 19082 Oct 16 16:02 /home/mailman_6/cgi-bin/admin
</pre>

</ul>

<h2><a name="Wanted48">WANTED gid 48, got 412</a></h2>


<p>See <a href="/dopsysadmin/faq/169.html">What do I change after changing the uid or gid?</a></p>

<p>In May, 2014, after changing from <code>apache</code> uid to <code>webuser</code> uid, we started to get:</p>

<pre>
Mailman CGI error!!!
This entry is being stored in your syslog:

Failure to exec script. WANTED gid 48, GOT gid 412.  (Reconfigure to take 412?)
</pre>

<p>After reviewing the above, the thing to do seemed to be to rebuild the setguid files in cgi-bin, see <code>/home/www/php/mailman/fixmailman</code>.</p>