Unvalidated Redirects And Forwards in Cyber Security

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Unvalidated Redirects And Forwards – Ultimate Guide

Mar 31, 2022
Sudip Sengupta

Redirection is an HTTP response type that informs clients that they are being sent to a different page. When a browser receives this response, it loads the URL defined in the page’s Location header, sending the visitors of one domain to the new destination URL. While redirection and forwarding are essential in directing users across pages, security gaps may allow attackers to force users to unwanted sites. This article discusses unvalidated redirects and forwards vulnerability, its impact, and various remediation practices.

Table of contentsWhat are Unvalidated Redirects and Forwards?Impact of Unvalidated Redirects and ForwardsHow to Prevent Unvalidated Redirects and Forwards?Remediation of Unvalidated Redirects and ForwardsHow Crashtest Security Can Help You With Unvalidated Redirects and Forwards What are Unvalidated Redirects and Forwards?

If a web application is susceptible to the URL redirection vulnerability, it accepts untrusted URL inputs that may cause it to redirect an innocent user’s request to malicious sites. Adversaries can craft a malicious URL within the untrusted input, redirecting victims to the attacker’s fabricated site where the user fills a login form with their credentials. This vulnerability, also known as Open Redirects, allows hackers to create links that bypass the web application’s security checks to escalate their privileges and perform privileged functions. 

The redirection vulnerability does not directly affect web applications, as it

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