Version 1.0.4 of Roundcube  contains a security fix:
Security: Fix possible CSRF attacks to some address book operations as well as to the ACL and Managesieve plugins.
Created roundcubemail tracking bugs for this issue:
Affects: fedora-all [bug 1179783]
Affects: epel-all [bug 1179784]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.