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This is actually an extremely simple risk to detect and exploits against it can occur in a number of different ways.In some ways, exploiting it is actually very similar to how you might approach a site which is vulnerable to the XSS flaws we looked at back in part 2 of this series.Whilst this has the potential to do considerable damage, it’s also a contentious vulnerability which some organisations consciously choose to leave open.
This includes manual user input such as form data, implicit user input such as request headers and constructed user input such as query string variables.
This video shows how to access and use the built in number format masking for Dollars, Euros, Decimals, and other number format types.
Secondary Validation - Validating Single choice option button with Comments box "provided answer".
However, it can readily be employed in conjunction with a combination of social engineering and other malicious activity such as a fraudulent website designed to elicit personal information or serve malware.
What an unvalidated redirect does is allows an attacker to exploit the trust a user has in a particular domain by using it as a stepping stone to another arbitrary, likely malicious site.