Usermin 0.980 through 1.x before 1.660 allows uconfigsave.cgi sigfilefree remote code execution because it uses the two argument (not three argument) form of Perl open.
Usermin before 1.600 allows remote attackers to execute arbitrary operating-system commands via unspecified vectors related to a user action.
Cross-site scripting (XSS) vulnerability in Usermin before 1.600 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors. NOTE: this might overlap CVE-2014-3924.