PHP remote file inclusion vulnerability in inc/claro_init_local.inc.php in Claroline 1.7.7 and earlier, as used in Dokeos and possibly other products, allows remote attackers to execute arbitrary PHP code via a URL in the extAuthSource[newUser] parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/28943
http://www.vupen.com/english/advisories/2006/3639
http://www.vupen.com/english/advisories/2006/3638
http://www.securityfocus.com/bid/20056
http://www.gulftech.org/?node=research&article_id=00112-09142006&