This bug was fixed in the package calibre - 2.55.0+dfsg-1ubuntu0.2

---------------
calibre (2.55.0+dfsg-1ubuntu0.2) xenial-security; urgency=medium

  * SECURITY UPDATE: JavaScript in a book can access local files using
    XMLHttpRequest (LP: #1758699).
    - fix-CVE-2016-10187.patch
    - CVE-2016-10187
  * SECURITY UPDATE: Malicious code execution when using CPickle instead of
    JSON.
    - fix-CVE-2018-7889.patch
    - CVE-2018-7889

 -- Simon Quigley <tsimo...@ubuntu.com>  Wed, 11 Apr 2018 23:50:09 -0500

** Changed in: calibre (Ubuntu Xenial)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1758699

Title:
  [CVE] JavaScript in a book can access local files using XMLHttpRequest

Status in calibre package in Ubuntu:
  Fix Released
Status in calibre source package in Trusty:
  Confirmed
Status in calibre source package in Xenial:
  Fix Released
Status in calibre source package in Artful:
  Fix Released

Bug description:
  For CVE-2016-10187:
  The E-book viewer in calibre before 2.75 allows remote attackers to read 
arbitrary files via a crafted epub file with JavaScript.

  For CVE-2018-7889:
  gui2/viewer/bookmarkmanager.py in Calibre 3.18 calls cPickle.load on imported 
bookmark data, which allows remote attackers to execute arbitrary code via a 
crafted .pickle file, as demonstrated by Python code that contains an os.system 
call.

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