A security flaw was found in the way Plone, a user friendly and powerful content management system, performed certain provided data validation when sending emails. A remote attacker, valid Plone user, could use this flaw to conduct email spoofing attacks.
References: http://plone.org/products/plone/security/advisories/20130611-announcement
The CVE identifier of CVE-2013-4192 has been assigned to this issue: http://www.openwall.com/lists/oss-security/2013/08/01/2
Created plone tracking bugs for this issue: Affects: epel-5 [bug 991015]