For the complete documentation index, see llms.txt. This page is also available as Markdown.

HTTP Headers

How to exploit HTTP Headers.

HTTP Header Issues

Headi

Headi is an automated HTTP header injection tool that will connect to a web server using various headers and monitor the responses for any potential weaknesses.

The following command will check for several header related issues on a URL.

headi -u URL

CRLF Vulnerabilities

CRLF injection occurs when it is possible to insert CR and LF characters into a web application using user-supplied input. This may force the server, application, or user into interpreting the CRLF as the end of a response and the beginning of another which may lead to HTTP response splitting.

CRLFuzz

CRLFuzz is a tool to scan for CRLF vulnerabilities.

The following command will check for CRLF issues on a URL.

./crlfuzz -u <URL>

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