Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah also includes some HTML sanitizers based on `html5lib`'s safelist, which are a specific application of the general transformation functionality.

Brakeman detects security vulnerabilities in Ruby on Rails applications via static analysis.

Adds methods to set and authenticate against one time passwords 2FA(Two factor Authentication). Inspired in AM::SecurePassword"

dawn is a security source code scanner for ruby powered code. It is especially designed for web applications, but it works also with general purpose ruby scripts. Dawn supports all major MVC frameworks like ruby on rails, padrino and sinatra; it provides more than 680 security checks with their own mitigation suggestion.

Tarantula is a big fuzzy spider. It crawls your Rails 2.3 and 3.x applications, fuzzing data to see what breaks.

xss_terminate is a plugin in that makes stripping and sanitizing HTML stupid-simple. Install and forget. And forget about forgetting to h() your output, because you won‘t need to anymore.

Find likely mass assignment vulnerabilities

Provides two class methods on ActiveController::Base that filter the params hash for that controller's actions. You can think of them as the controller analog of attr_protected and attr_accessible.

Lint your Gemfile!

Shell execution made easy and secure

Adds 'sudo' methods to update protected ActiveRecord attributes with mass assignment

A rack middleware for whitelisting and blacklisting IPs

This plugin replaces the default ERB template handlers with erubis, and switches the behaviour to escape by default rather than requiring you to escape. This is consistent with the behaviour in Rails 3.0.

Somewhat more radical filters designed to decimate malicious requests during a denial-of-service (DoS) attack by chopping their connection well before your Rack app wastes any significant resources on them – ouch! The filters have been proven to work against certain DoS attacks, however, they might also block IPs behind proxies or VPNs. Make sure you have understood how the filters are triggered and consider this middleware a last resort only to be enabled during an attack.

Ruby on Rails Plugin that automatically wraps html_escape() around ActiveRecord attribute methods associated with string and text fields in the database.

Checks Ruby on Rails models for use of the attr_accessible white list.