Cross-site scripting (XSS) vulnerability in Grayscale Blog 0.8.0, and possibly earlier versions, allows remote attackers to inject arbitrary web script or HTML via the comment fields to (1) scripts/addblog_comment.php and (2) detail.php.
http://www.vupen.com/english/advisories/2007/0916
http://www.securityfocus.com/archive/1/462441/100/0/threaded