Cross-site scripting (XSS) vulnerability in Roundcube Webmail 0.8.1 and earlier allows remote attackers to inject arbitrary web script or HTML via the signature in an email.
https://github.com/roundcube/roundcubemail/commit/c086978f6a91eacb339fd2976202fca9dad2ef32
http://www.openwall.com/lists/oss-security/2012/08/20/9
http://www.openwall.com/lists/oss-security/2012/08/20/2