An updated mailman package that fixes multiple security issues is now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. Description Mailman is a program used to help manage email discussion lists. Multiple input sanitization flaws were found in the way Mailman displayed usernames of subscribed users on certain pages. If a user who is subscribed to a mailing list were able to trick a victim into visiting one of those pages, they could perform a cross-site scripting attack against the victim. Multiple input sanitization flaws were found in the way Mailman displayed mailing list information. A mailing list administrator could use this flaw to conduct a cross-site scripting attack against victims viewing a list"s "listinfo" page. Red Hat would like to thank Mark Sapiro for reporting these issues. Users of mailman should upgrade to this updated package, which contains backported patches to correct these issues.