A roundcube security update has been released for Debian GNU/Linux 8 LTS to address a Cross-Side Scripting (XSS) attack leading to the execution of arbitrary code.

DSA 4700-1: roundcube security update

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Debian Security Advisory DSA-4700-1 security@debian.org
  https://www.debian.org/security/ Sebastien Delafond
June 11, 2020   https://www.debian.org/security/faq
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Package : roundcube
CVE ID : CVE-2020-13964 CVE-2020-13965
Debian Bug : 962123 962124

Matei Badanoiu and LoRexxar@knownsec discovered that roundcube, a
skinnable AJAX based webmail solution for IMAP servers, did not
correctly process and sanitize requests. This would allow a remote
attacker to perform a Cross-Side Scripting (XSS) attack leading to the
execution of arbitrary code.

For the oldstable distribution (stretch), these problems have been fixed
in version 1.2.3+dfsg.1-4+deb9u5.

For the stable distribution (buster), these problems have been fixed in
version 1.3.13+dfsg.1-1~deb10u1.

We recommend that you upgrade your roundcube packages.

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

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/