Support of Ruby 2.3 removed as its life ended

app/controllers/core.rb

@@ -39,7 +39,7 @@ module WPScan
         output('@notice', msg: 'It seems like you have not updated the database for some time.')
         print '[?] Do you want to update now? [Y]es [N]o, default: [N]'
 
-        Readline.readline =~ /^y/i ? true : false
+        /^y/i.match?(Readline.readline) ? true : false
       end
 
       def update_db
@@ -69,7 +69,7 @@ module WPScan
       def check_wordpress_state
         raise Error::WordPressHosted if target.wordpress_hosted?
 
-        if Addressable::URI.parse(target.homepage_url).path =~ %r{/wp-admin/install.php$}i
+        if %r{/wp-admin/install.php$}i.match?(Addressable::URI.parse(target.homepage_url).path)
 
           output('not_fully_configured', url: target.homepage_url)
 

app/finders/interesting_findings/emergency_pwd_reset_script.rb

@@ -14,7 +14,7 @@ module WPScan
 
           Model::EmergencyPwdResetScript.new(
             target.url(path),
-            confidence: res.body =~ /password/i ? 100 : 40,
+            confidence: /password/i.match?(res.body) ? 100 : 40,
             found_by: DIRECT_ACCESS,
             references: {
               url: 'https://codex.wordpress.org/Resetting_Your_Password#Using_the_Emergency_Password_Reset_Script'

app/finders/users/author_posts.rb

@@ -50,7 +50,7 @@ module WPScan
 
             if uri.path =~ %r{/author/([^/\b]+)/?\z}i
               usernames << [Regexp.last_match[1], 'Author Pattern', 100]
-            elsif uri.query =~ /author=[0-9]+/
+            elsif /author=[0-9]+/.match?(uri.query)
               usernames << [node.text.to_s.strip, 'Display Name', 30]
             end
           end

app/models/timthumb.rb

@@ -63,7 +63,7 @@ module WPScan
       def webshot_enabled?
         res = Browser.get(url, params: { webshot: 1, src: "http://#{default_allowed_domains.sample}" })
 
-        res.body =~ /WEBSHOT_ENABLED == true/ ? false : true
+        /WEBSHOT_ENABLED == true/.match?(res.body) ? false : true
       end
 
       # @return [ Array<String> ] The default allowed domains (between the 2.0 and 2.8.13)