USN-8132-1: Roundcube Webmail vulnerabilities

It was discovered that Roundcube Webmail did not properly sanitize
certain HTML elements within the e-mail body. An attacker could possibly
use this issue to cause a cross-site scripting attack. This issue was only
addressed in Ubuntu 16.04 LTS. (CVE-2016-4068, CVE-2016-4069)

It was discovered that Roundcube Webmail did not properly handle certain
configuration parameters. An attacker could possibly use this issue to
execute arbitrary code. This issue was only addressed in Ubuntu 16.04 LTS.
(CVE-2016-9920)

It was discovered that Roundcube Webmail did not properly sanitize CSS styles
within SVG documents. An attacker could possibly use this issue to cause
a cross-site scripting attack. This issue was only addressed in Ubuntu 16.04 LTS.
(CVE-2017-6820)

It was discovered that Roundcube Webmail did not properly restrict exec call in
certain drivers of the password plugin. An authenticated user could possibly
use this issue to perform arbitrary password resets. This issue was only addressed in
Ubuntu 16.04 LTS. (CVE-2017-8114)

It was discovered that Roundcube Webmail did not properly set file permissions within
the Enigma plugin. An attacker could possibly use this issue to exfiltrate GPG private
keys via network connectivity. (CVE-2018-1000071)

It was discovered that Roundcube Webmail did not properly handle GnuPG MDC
integrity-protection warnings. An attacker could possibly use this issue to obtain
sensitive information from encrypted communications. (CVE-2018-19205)

It was discovered that Roundcube Webmail did not properly sanitize