First check the current version of Perl

# perl -v

If the older version of Perl is running on server, you get an output something like,

This is perl, v5.8.7 built for i686-linux

Upgrade perl on the Cpanel server
1) Download the latest perl installer from cPanel site.

# wget http://layer1.cpanel.net/perl588installer.tar.gz

2) Untar the file as,

# tar -zxvf perl588installer.tar.gz

3) Change the directory to perl588installer

# cd perl588installer

4) Now run the installer file as,

 # ./install

5) Check perl modules

 # /scripts/checkperlmodules

6) Force a cPanel update

 # /scripts/upcp –force

7) Check the new installed perl version using “perl -v” and you get an output something like,

This is perl, v5.8.8 built for i686-linux