The following errata for CentOS-2 have been built and uploaded the the centos mirror:

RHSA-2004:585-01 Updated xchat package fixes SOCKSv5 proxy security issue

Files available: xchat-1.8.9-1.21as.2.i386.rpm

More details are available from the RedHat web site at https://rhn.redhat.com/errata/rh21as-errata.html

The easy way to make sure you are up to date with all the latest patches is to run: # yum update