Arbitrary Code Execution Affecting plug package, versions >=1.3.0 <1.3.2 >=1.2.0-rc.0 <1.2.3 >=1.1.0 <1.1.7 <1.0.4



    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.17% (54th percentile)
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8.1 high

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  • Snyk ID SNYK-HEX-PLUG-1088058
  • published 30 Mar 2021
  • disclosed 28 Feb 2017
  • credit Griffin Byatt, Matthew Diaz

How to fix?

Upgrade plug to version 1.3.2, 1.2.3, 1.1.7, 1.0.4 or higher.


plug is a specification and conveniences for composable modules between web applications.

Affected versions of this package are vulnerable to Arbitrary Code Execution. The default serialization used by Plug session may result in code execution in certain situations. This attack can only be exploited if the attacker has access to your secret key as well as your signing/encryption salts as the session cookie is signed.