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Date: Thu, 25 Jan 2018 16:59:35 +0100
From: Daniel Beck <>
Subject: Re: Jenkins Script Security Plugin 1.36 and earlier
 arbitrary file read vulnerability

> On 11. Dec 2017, at 15:27, Daniel Beck <> wrote:
> Users with the ability to configure sandboxed Groovy scripts are able to
> use a type coercion feature in Groovy to create new `File` objects from
> strings. This allowed reading arbitrary files on the Jenkins master file
> system.
> Such a type coercion is now subject to sandbox protection and considered
> to be a call to the `new File(String)` constructor for the purpose of
> in-process script approval.


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