J-Web in Juniper Junos before 10.4R13 11.4 before 11.4R7 12.1R before 12.1R6 12.1X44 before 12.1X44-D15 12.1x45 before 12.1X45-D10 12.2 before 12.2R3 12.3 before 12.3R2 and 13.1 before 13.1R3 allow remote attackers to bypass the cross-site request forgery (CSRF) protection mechanism and hijack the authentication of administrators for requests that (1) create new administrator accounts or (2) have other unspecified impacts.