rcube_image.php in Roundcube Webmail before 1.4.4 allows attackers to execute arbitrary code via shell metacharacters in a configuration setting for im_convert_path or im_identify_path.
https://securityaffairs.com/155420/apt/apt8-exploited-outlook-0day-target-nato.html
https://security.gentoo.org/glsa/202007-41
https://roundcube.net/news/2020/04/29/security-updates-1.4.4-1.3.11-and-1.2.10
https://github.com/roundcube/roundcubemail/releases/tag/1.4.4
https://github.com/roundcube/roundcubemail/compare/1.4.3...1.4.4
https://github.com/roundcube/roundcubemail/commit/fcfb099477f353373c34c8a65c9035b06b364db3
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00083.html