A horizon security update has been released for Debian GNU/Linux 10 to address an open redirect in the workflow forms of OpenStack Horizon.

DSA 4820-1: horizon security update

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Debian Security Advisory DSA-4820-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
December 27, 2020   https://www.debian.org/security/faq
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Package : horizon
CVE ID : CVE-2020-29565
Debian Bug : 976872

Pritam Singh discovered an open redirect in the workflow forms of
OpenStack Horizon.

For the stable distribution (buster), this problem has been fixed in
version 3:14.0.2-3+deb10u2.

We recommend that you upgrade your horizon packages.

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

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