awstats.pl in AWStats 6.8 and earlier does not properly remove quote characters, which allows remote attackers to conduct cross-site scripting (XSS) attacks via the query_string parameter. NOTE: this issue exists because of an incomplete fix for CVE-2008-3714.

More... (http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2008-5080)