Improper Input Validation Affecting thin Open this link in a new tab package, versions <1.2.4

  • Attack Complexity


Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • snyk-id


  • published

    31 Jul 2019

  • disclosed

    22 Sep 2009

  • credit


How to fix?

Upgrade thin to version 1.2.4 or higher.


thin is a thin and fast web server.

Affected versions of this package are vulnerable to Improper Input Validation. lib/thin/connection.rb relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.