CRLF injection vulnerability in index.php in phpWebSite 0.9.3-4 allows remote attackers to perform HTTP Response Splitting attacks to modify expected HTML content from the server via the block_username parameter in the user module.
https://exchange.xforce.ibmcloud.com/vulnerabilities/18046
http://security.gentoo.org/glsa/glsa-200411-35.xml
http://secunia.com/advisories/13172/
http://phpwebsite.appstate.edu/index.php?module=announce&ANN_id=863&ANN_user_op=view