Injectus - CRLF And Open Redirect Fuzzer

Injectus – CRLF And Open Redirect Fuzzer

Simple python tool that goes through a list of URLs trying CRLF and open redirect payloads.

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usage: Injectus [-h] [-f FILE] [-u URL] [-r] [-w WORKERS] [-t TIMEOUT]
[-d DELAY] [-c] [-op]

CRLF and open redirect fuzzer. Crafted by @dubs3c.

optional arguments:
-h, --help show this help message and exit
-f FILE, --file FILE File containing URLs
-u URL, --url URL Single URL to test
-r, --no-request Only build attack list, do not perform any requests
-w WORKERS, --workers WORKERS
Amount of asyncio workers, default is 10
-t TIMEOUT, --timeout TIMEOUT
HTTP request timeout, default is 6 seconds
-d DELAY, --delay DELAY
The delay between requests, default is 1 second
-c, --crlf Only perform crlf attacks
-op, --openredirect Only perform open redirect attacks


Needed a simple CRLF/open redirect scanner that I could include into my bug bounty pipeline at Didn’t find any tools that satisfied my need, so I created Injectus. It’s a little bit of an experiment, to see if it works better than other tools.

If we have the following URL:

For CRLF attacks, Injectus will inject every payload once into the value of one parameter, for every n parameters. For example, Injectus will create the following list with the URL above: =value3 strike

As you can see, every CRLF payload is injected in the first parameter’s value. Once the loop is done, Injectus will inject every payload into the second parameter, and so on. Once all parameters have been injected, the list is complete.
If there are no query parameters, Injectus will simply append each payload to the URL, like so:

When injecting open redirect payloads, Injectus will only inject a payload if there exists a query/path parameter containing a typical redirect keyword, e.g. url. Injecting into the following URL$$2fbountystrike.ioparam3=value3

The URL contains the query parameter url, so Injectus will inject the payloads into that parameter.
An example when using path parameters. Original URL is$$

As before, if no query parameters or path parameters are found, Injectus will simply append each payload to the URL:$$\


pip3.7 install -r requirements.txt --user

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