Improves detection of WP Version, Plugins etc by checking 404

app/finders/main_theme/css_style_in_404_page.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+module WPScan
+  module Finders
+    module MainTheme
+      # From the CSS style in the 404 page
+      class CssStyleIn404Page < CssStyleInHomepage
+        def passive(opts = {})
+          passive_from_css_href(target.error_404_res, opts) || passive_from_style_code(target.error_404_res, opts)
+        end
+      end
+    end
+  end
+end

app/finders/main_theme/css_style_in_homepage.rb

@@ -3,9 +3,9 @@
 module WPScan
   module Finders
     module MainTheme
-      # From the css style
-      class CssStyle < CMSScanner::Finders::Finder
-        include Finders::WpItems::URLsInHomepage
+      # From the CSS style in the homepage
+      class CssStyleInHomepage < CMSScanner::Finders::Finder
+        include Finders::WpItems::UrlsInPage # To have the item_code_pattern method available here
 
         def create_theme(slug, style_url, opts)
           Model::Theme.new(

app/finders/main_theme/urls_in_404_page.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+module WPScan
+  module Finders
+    module MainTheme
+      # URLs In 404 Page Finder
+      class UrlsIn404Page < UrlsInHomepage
+        # @return [ Typhoeus::Response ]
+        def page_res
+          @page_res ||= target.error_404_res
+        end
+      end
+    end
+  end
+end

app/finders/main_theme/urls_in_homepage.rb

@@ -5,7 +5,7 @@ module WPScan
     module MainTheme
       # URLs In Homepage Finder
       class UrlsInHomepage < CMSScanner::Finders::Finder
-        include WpItems::URLsInHomepage
+        include WpItems::UrlsInPage
 
         # @param [ Hash ] opts
         #
@@ -21,6 +21,11 @@ module WPScan
 
           found
         end
+
+        # @return [ Typhoeus::Response ]
+        def page_res
+          @page_res ||= target.homepage_res
+        end
       end
     end
   end

app/finders/main_theme/woo_framework_meta_generator.rb

@@ -10,7 +10,7 @@ module WPScan
         PATTERN           = /#{THEME_PATTERN}\s+#{FRAMEWORK_PATTERN}/i.freeze
 
         def passive(opts = {})
-          return unless target.homepage_res.body =~ PATTERN
+          return unless target.homepage_res.body =~ PATTERN || target.error_404_res.body =~ PATTERN
 
           Model::Theme.new(
             Regexp.last_match[1],