Improves detection of WP Version, Plugins etc by checking 404

app/finders/wp_items/urls_in_page.rb

@@ -0,0 +1,72 @@
+# frozen_string_literal: true
+
+module WPScan
+  module Finders
+    module WpItems
+      # URLs In Homepage Module to use in plugins & themes finders
+      module UrlsInPage
+        # @param [ String ] type plugins / themes
+        # @param [ Boolean ] uniq Wether or not to apply the #uniq on the results
+        #
+        # @return [Array<String> ] The plugins/themes detected in the href, src attributes of the homepage
+        def items_from_links(type, uniq = true)
+          found = []
+
+          target.in_scope_uris(page_res) do |uri|
+            next unless uri.to_s =~ item_attribute_pattern(type)
+
+            slug = Regexp.last_match[1]&.strip
+
+            found << slug unless slug&.empty?
+          end
+
+          uniq ? found.uniq.sort : found.sort
+        end
+
+        # @param [ String ] type plugins / themes
+        # @param [ Boolean ] uniq Wether or not to apply the #uniq on the results
+        #
+        # @return [Array<String> ] The plugins/themes detected in the javascript/style of the homepage
+        def items_from_codes(type, uniq = true)
+          found = []
+
+          page_res.html.xpath('//script[not(@src)]|//style[not(@src)]').each do |tag|
+            code = tag.text.to_s
+            next if code.empty?
+
+            code.scan(item_code_pattern(type)).flatten.uniq.each { |slug| found << slug }
+          end
+
+          uniq ? found.uniq.sort : found.sort
+        end
+
+        # @param [ String ] type
+        #
+        # @return [ Regexp ]
+        def item_attribute_pattern(type)
+          @item_attribute_pattern ||= %r{#{item_url_pattern(type)}([^/]+)/}i
+        end
+
+        # @param [ String ] type
+        #
+        # @return [ Regexp ]
+        def item_code_pattern(type)
+          @item_code_pattern ||= %r{["'\( ]#{item_url_pattern(type)}([^\\\/\)"']+)}i
+        end
+
+        # @param [ String ] type
+        #
+        # @return [ Regexp ]
+        def item_url_pattern(type)
+          item_dir = type == 'plugins' ? target.plugins_dir : target.content_dir
+          item_url = type == 'plugins' ? target.plugins_url : target.content_url
+
+          url = /#{item_url.gsub(/\A(?:https?)/i, 'https?').gsub('/', '\\\\\?\/')}/i
+          item_dir = %r{(?:#{url}|\\?\/#{item_dir.gsub('/', '\\\\\?\/')}\\?/)}i
+
+          type == 'plugins' ? item_dir : %r{#{item_dir}#{type}\\?\/}i
+        end
+      end
+    end
+  end
+end