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Unblocker

Web - Easy

Description: Need to access a blocked website? Use our unblocker to access it!

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Clicking on Access Restricted Content takes us to http://unblck3r.eng.run/flag endpoint, which is Forbidden \ Passing the same in unblocker gives Error: Received status code 403

Further inspection tells that on clicking on "Unblock", a GET request is made at /proxy?url=<input_url> by the iframe

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Trying different enumerations of localhost:

  • http://localhost/flag -> Blocked unsafe URL
  • http://127.0.0.1/flag -> Blocked unsafe URL
  • http://[::1]/flag -> Blocked unsafe URL
  • http://2130706433/flag -> flag{cd3d0356d34630b7b97f972b23a5ee38}