A php-horde-kronolith security update has been released for Debian GNU/Linux 9 LTS.

DLA 2350-1: php-horde-kronolith security update

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Debian LTS Advisory DLA-2350-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Mike Gabriel
August 29, 2020   https://wiki.debian.org/LTS
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Package : php-horde-kronolith
Version : 4.2.19-1+deb9u1
CVE ID : CVE-2017-16908
Debian Bug : 909738

In Horde Groupware, there has been an XSS via the Name field during
creation of a new Resource. This could have been leveraged for remote
code execution after compromising an administrator account, because the
CVE-2015-7984 CSRF protection mechanism can then be bypassed.

For Debian 9 stretch, this problem has been fixed in version
4.2.19-1+deb9u1.

We recommend that you upgrade your php-horde-kronolith packages.

For the detailed security status of php-horde-kronolith please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/php-horde-kronolith

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS