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Open redirect

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Last revision (mm/dd/yy): 05/27/2009

Vulnerabilities Table of Contents


An open redirect is an application that takes a parameter and redirects a user to the parameter value without any validation. This vulnerability is used in phishing attacks to get users to visit malicious sites without realizing it.



Platform All web platforms affected

Risk Factors



The phishing use can be more complex, using complex encoding:

Real redirect:

Faked link:

Related Attacks

Related Vulnerabilities

Related Controls

  • To avoid the open redirect vulnerability, parameters of the application script/program must be validated before sending 302 HTTP code (redirect) to the client browser.

The server must have a relation of the authorized redirections (i.e. in a database).

Related Technical Impacts