Reflector is a tool to check for reflected query parameter values.
Reflector is a command line tool that takes a single argument, which is the name of a file containing a list of URLs to check. The file should contain one URL per line.
reflector urls.txt
Reflector will write the URLs for which query parameter values are reflected in the response body to a file named "reflected_urls.txt" in the current working directory. It will also print the URLs to the console.
go install github.com/thecyberworld/reflector@latest