A flatpak security update has been released for Debian GNU/Linux 10 to address an issue where the sandbox restrictions can be bypassed.

DSA 4868-1: flatpak security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4868-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
March 12, 2021   https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : flatpak
CVE ID : CVE-2021-21381

Anton Lydike discovered that sandbox restrictions in Flatpak, an
application deployment framework for desktop apps, could by bypassed
via a malicious .desktop file.

For the stable distribution (buster), this problem has been fixed in
version 1.2.5-0+deb10u4.

We recommend that you upgrade your flatpak packages.

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

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/