A security flaw was found in the way Plone, a user friendly and powerful content management system, enforced immutable setting on certain content edit forms. A remote attacker could use this flaw to provide a specially-crafted URL that would (in a non-persistent way) hide certain fields from these content edit forms, possibly leading to scenario such altered forms to be erroneously accepted by authenticated Plone user as valid.
References: http://plone.org/products/plone/security/advisories/20130611-announcement
The CVE identifier of CVE-2013-4193 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]