admin/ajoutaut.php in JBlog 1.0 does not require authentication, which allows remote attackers to create arbitrary accounts via modified mot and droit parameters.
https://www.exploit-db.com/exploits/4211
https://exchange.xforce.ibmcloud.com/vulnerabilities/35550
http://www.vupen.com/english/advisories/2007/2611
http://www.securityfocus.com/archive/1/474320/100/0/threaded
http://securityreason.com/securityalert/2919