Retains db_data for Plugin, Theme and WpVersion models

app/models/plugin.rb

@@ -17,7 +17,7 @@ module WPScan
 
       # @return [ JSON ]
       def db_data
-        DB::Plugin.db_data(slug)
+        @db_data ||= DB::Plugin.db_data(slug)
       end
 
       # @param [ Hash ] opts

app/models/theme.rb

@@ -23,7 +23,7 @@ module WPScan
 
       # @return [ JSON ]
       def db_data
-        DB::Theme.db_data(slug)
+        @db_data ||= DB::Theme.db_data(slug)
       end
 
       # @param [ Hash ] opts

app/models/wp_version.rb

@@ -37,7 +37,7 @@ module WPScan
 
       # @return [ JSON ]
       def db_data
-        DB::Version.db_data(number)
+        @db_data ||= DB::Version.db_data(number)
       end
 
       # @return [ Array<Vulnerability> ]