Cross-site scripting (XSS) vulnerability in SPIP 1.8.2 and earlier allows remote attackers to inject arbitrary web script or HTML via unspecified parameters to (1) spip_login.php3 and (2) spip_pass.php3.
http://www.vupen.com/english/advisories/2005/3061
http://www.securityfocus.com/bid/16019