Improper Authentication Affecting cgi Open this link in a new tab package, versions >=0.3.0, <0.3.1 >=0.2.0, <0.2.1 <0.1.1

  • Exploit Maturity

    Proof of concept

  • Attack Complexity


  • Integrity


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  • snyk-id


  • published

    23 Jan 2022

  • disclosed

    21 Jan 2022

  • credit


How to fix?

Upgrade cgi to version 0.3.1, 0.2.1, 0.1.1 or higher.


cgi is a Support for the Common Gateway Interface protocol.

Affected versions of this package are vulnerable to Improper Authentication. CGI::Cookie.parse mishandles security prefixes in cookie names by applying URL decoding to cookie names. An attacker could exploit this vulnerability to spoof security prefixes in cookie names, which may be able to trick a vulnerable application.