Add check method

modules/exploits/unix/webapp/get_simple_cms_upload_exec.rb

@@ -84,6 +84,24 @@ class Metasploit3 < Msf::Exploit::Remote
     res
   end
 
+  def check
+    res = send_request_cgi({'uri' => normalize_uri(target_uri.path.to_s, 'admin', 'index.php')})
+
+    if res && res.code == 200 && res.body && res.body.to_s =~ /GetSimple CMS.*Version\s*([0-9\.]+)/
+      version = $1
+    else
+      return Exploit::CheckCode::Unknown
+    end
+
+    print_status("#{peer} - Version #{version} found")
+
+    if Gem::Version.new(version) <= Gem::Version.new('3.1.2')
+      return Exploit::CheckCode::Appears
+    end
+
+    Exploit::CheckCode::Safe
+  end
+
   def exploit
     print_status("#{peer} - Authenticating...")
     res = send_request_auth